Educational food web diagram illustrating energy transfer from producers to consumers in an ecosystem.

Let’s go step by step through each question using the food web pyramid shown.

---

Question 1: There are many more _______________ than there are primary consumers.

In any food pyramid, energy flows from bottom to top. The bottom level (producers) has the most organisms because they get energy directly from the sun and support all other levels. Primary consumers eat producers — so there must be *more* producers than primary consumers to feed them.

✔ Answer: producers

---

Question 2: Organisms that eat other organisms are called _______________.

Organisms that cannot make their own food and must eat others are called heterotrophs. “Hetero” means different, “troph” means nourishment — so they get nourishment from other things.

✔ Answer: Heterotrophs

---

Question 3: Organisms that make their own food are called _______________.

These are autotrophs (“auto” = self, “troph” = nourishment). They’re also called producers because they produce food for themselves and others via photosynthesis or chemosynthesis.

✔ Answer: producers and autotrophs

*(Note: Both terms are correct — “producers” is ecological role, “autotrophs” is biological classification.)*

---

Question 4: Grass is _______________.

Grass makes its own food using sunlight → it’s an autotroph → which means it’s also a producer.

✔ Answer: an autotroph

*(Could also say “a producer,” but since the blank says “is ___”, and “an autotroph” fits grammatically and scientifically, we’ll go with that.)*

---

Question 5: Zebras (grass-eaters) are _______________.

Zebras eat grass → grass is a producer → so zebras are primary consumers (they eat producers).

✔ Answer: Primary consumers

---

Question 6: Lions (zebra-eaters) are _______________.

Lions eat zebras → zebras are primary consumers → so lions are secondary consumers? Wait — let’s check the pyramid.

Looking at the pyramid:

- Producers → Primary Consumers → Secondary Consumers → Tertiary Consumers → Quaternary Consumers

If zebras are primary consumers, then animals that eat them (like lions) would be secondary consumers.

BUT — in the diagram, raccoon and snake are labeled as tertiary consumers eating rats/spiders (which are secondary consumers). Hawk eats snake/raccoon → quaternary.

Wait — let’s map this carefully.

Actually, in standard ecology:

- Producer → Primary Consumer → Secondary Consumer → Tertiary Consumer → etc.

So if zebra = primary consumer → lion = secondary consumer.

But the answer written in red says “Tertiary consumers”. That might be incorrect unless the chain is longer.

Hold on — maybe the problem assumes a different chain?

Let’s think again.

In the given pyramid:

Level 1: Producers (algae, moss, plants, wheat)

Level 2: Primary Consumers (tiny fish, grub, grasshopper) — these eat producers

Level 3: Secondary Consumers (rat, spider) — eat primary consumers

Level 4: Tertiary Consumers (snake, raccoon) — eat secondary consumers

Level 5: Quaternary Consumers (hawk) — eats tertiary consumers

Now, zebras aren’t in the diagram — but the question says “zebras (grass-eaters)” → so they’d be like grasshoppers or grubs → primary consumers.

Then lions eat zebras → so lions would be like rats or spiders → secondary consumers.

But the red answer says “Tertiary consumers”.

That suggests maybe the question implies a longer chain? Or perhaps it's assuming lions eat animals that already ate herbivores?

Wait — maybe the question is testing whether you know that large predators like lions are often tertiary or higher.

But strictly based on trophic levels:

If zebra = primary consumer → lion = secondary consumer.

However, in real ecosystems, lions may eat animals that are themselves carnivores (e.g., hyenas), making lions tertiary. But here, it specifically says “lion (zebra-eater)” — so direct link: zebra → lion.

Thus, lion should be secondary consumer.

But the red answer says “Tertiary consumers” — which contradicts logic unless...

Wait — look back at the pyramid labels:

It says:

- Secondary Consumers (eat primary consumers) → rat, spider

- Tertiary Consumers (eat secondary consumers) → snake, raccoon

So if lion eats zebra (primary consumer), lion = secondary consumer.

Unless... maybe the question meant “lions eat animals that eat zebras”? No, it says “lion (zebra-eater)”.

This seems like a mistake in the provided red answers.

But wait — perhaps in some curricula, they count differently? Let me double-check.

Alternative approach: Sometimes people miscount.

Producer → 1st level

Primary consumer → 2nd level

Secondary consumer → 3rd level

Tertiary consumer → 4th level

So if lion eats zebra (which is 2nd level), lion is 3rd level → secondary consumer.

Yes.

But the red answer says “Tertiary consumers” — which would mean lion is 4th level.

That only happens if zebra were secondary consumer — but zebra eats grass → primary.

So either:

1. The red answer is wrong.

OR

2. The question intends for us to follow the pattern of the pyramid where “tertiary” refers to third-level eater regardless of starting point? Unlikely.

Wait — let’s read the question again: “Lions (zebra-eaters) are _______________.”

And in the pyramid, what eats primary consumers? Secondary consumers.

What eats secondary consumers? Tertiary.

So lion eating zebra (primary) → secondary.

But maybe the curriculum considers “primary consumer” as first consumer level, so:

- Level 1: producer

- Level 2: primary consumer

- Level 3: secondary consumer

- Level 4: tertiary consumer

So lion at level 3 → secondary.

I think the red answer is incorrect.

But hold on — perhaps in the context of the whole system, lions are apex predators and thus considered tertiary even if they eat primary consumers? Not accurate scientifically.

Alternatively, maybe the question meant “lions eat animals that eat zebras” — but it doesn't say that.

Given the strict definition and the pyramid structure shown, I believe the correct answer should be secondary consumers.

However, since the user included red answers and asked to solve accurately, and if we assume the red answers are part of the expected solution (perhaps due to curriculum-specific teaching), we might have to go with “tertiary” — but that would be misleading.

Wait — let’s check online or standard definitions.

Standard biology:

- Autotroph/producers: make own food

- Heterotroph/consumers: eat others

- Primary consumer: eats producer

- Secondary consumer: eats primary consumer

- Tertiary consumer: eats secondary consumer

So lion eating zebra (primary) → secondary consumer.

Example: Grass → Zebra → Lion → So lion is secondary.

Another example: Algae → Tiny Fish → Rat → Snake → Hawk

Here, rat is secondary, snake is tertiary, hawk is quaternary.

Similarly, if zebra is primary, lion is secondary.

Therefore, the red answer “Tertiary consumers” for question 6 is likely incorrect.

But since the task is to solve accurately, I will provide the scientifically correct answer.

However, looking back at the image description — the red text is already filled in. Maybe the student wants verification?

The instruction says: “Solve the problem accurately.” So I should give correct answers, not necessarily match the red ones if they're wrong.

But let’s see — perhaps in this specific diagram, how are roles assigned?

In the diagram:

- Grasshopper (eats plants) → primary consumer

- Spider (eats grasshopper?) → secondary consumer

- Raccoon (eats spider?) → tertiary consumer

- Hawk (eats raccoon) → quaternary

So same logic applies.

Zebra = like grasshopper → primary

Lion = like spider → secondary

Thus, question 6 should be secondary consumers

But the red answer says “Tertiary consumers”

This is a conflict.

Perhaps the question meant “lions eat animals that eat zebras” — but it doesn’t say that.

Maybe it's a trick — zebras are primary, but lions sometimes eat other carnivores, so overall they can be tertiary — but the question specifies “zebra-eaters”, implying direct consumption.

I think the accurate answer is secondary consumers.

However, to align with common textbook simplifications where large predators are called tertiary, some sources might say that.

But strictly speaking, based on trophic levels defined by diet, it's secondary.

Given that, and since the task is to solve accurately, I'll go with science.

But wait — let's look at question 5: Zebras are primary consumers — correct.

Question 6: Lions eat zebras — so next level up — secondary.

Yes.

Final decision: Question 6 answer should be secondary consumers, not tertiary.

But the red answer says tertiary — so perhaps there's a mistake in the original material.

Since my job is to provide accurate solutions, I will correct it.

However, upon second thought — in some educational systems, they label:

- First-order consumer = primary

- Second-order = secondary

- Third-order = tertiary

And if lion is third in chain: plant → zebra → lion → that's three links, so lion is second-order consumer? No.

Chain length:

Number of arrows:

Plant → zebra → lion : two transfers, so lion is at trophic level 3 (producer=1, primary=2, secondary=3)

Trophic level numbering:

- Producers: TL 1

- Primary consumers: TL 2

- Secondary consumers: TL 3

- Tertiary consumers: TL 4

So lion eating zebra (TL2) → lion is TL3 → secondary consumer.

Tertiary consumer would be TL4, e.g., something that eats lion.

So yes, lion is secondary consumer when eating zebra.

Therefore, the red answer for #6 is wrong.

But since the user might expect the red answers, and the instruction is to solve accurately, I must choose accuracy.

Alternatively, perhaps the question has a typo, and it meant "lions eat animals that eat zebras" — but it doesn't say that.

I think I should provide the correct scientific answer.

So for #6: secondary consumers

But let's confirm with another angle.

In the pyramid, what is the equivalent of lion? If zebra is like grasshopper (primary), then lion is like rat or spider (secondary).

Rat and spider are labeled as secondary consumers.

So lion should be secondary.

Yes.

Therefore, final answers:

1. producers
2. Heterotrophs
3. producers and autotrophs
4. an autotroph
5. Primary consumers
6. secondary consumers

But the red answer for 6 is "Tertiary consumers" — which is incorrect based on the information given.

Since the task is to solve accurately, I will output the correct version.

However, to be safe, let's see if there's any interpretation where lion is tertiary.

Only if zebra were secondary consumer — but zebra eats grass, so no.

Unless "grass-eaters" includes animals that eat other things too — but still, primarily primary.

I think it's clear.

So I'll proceed with corrected answer for #6.

──────────────────────────────────────

Final Answer:
1. producers
2. Heterotrophs
3. producers and autotrophs
4. an autotroph
5. Primary consumers
6. secondary consumers