Diagram showing different types of salamanders, highlighting their diverse patterns and forms.

Let’s look at the drawings carefully. Each drawing shows a different kind of salamander or amphibian, and they’re numbered from 1 to 11.

The task is likely asking you to identify which ones are larvae (baby stage) and which are adults, based on their features — especially whether they have external gills or not.

Here’s how we can tell:

- Larvae often have feathery external gills near their heads (like little frilly things sticking out).
- They may also have tails that are more fin-like for swimming.
- Adults usually don’t have those gills — they breathe air with lungs or through skin.
- Some adults have spots or patterns; larvae might be plainer or have different markings.

Now let’s go one by one:

1. No gills → adult
2. No gills → adult
3. No gills → adult
4. Very small, no legs yet? Wait — it has tiny legs, but no gills → could be late larva or juvenile, but probably still considered larval form if it’s aquatic and hasn’t metamorphosed fully. But in many keys, if no gills and has four limbs, it’s post-larval. Let’s hold off. Actually, looking again — this one looks like a simplified drawing of a young salamander without gills → maybe juvenile/adult. Hmm. Better to use clear signs: gills = larva.

Wait — let’s focus on the ones with obvious external gills:

→ Drawing #6: Has big feathery gills on sides of head → definitely larva
→ Drawing #10: Also has feathery gills → larva
→ Drawing #5: Looks very thin, almost transparent, no visible gills? Wait — actually, looking closely, #5 doesn’t show gills, but its body shape is very elongated and simple — possibly a larva too? Not sure.

Actually, standard biology diagrams usually mark larvae by presence of external gills.

So:

✔ Larvae (with external gills):
- #6
- #10

What about #9? It has small bump where gills might be? No — doesn’t look like full gills. Probably not.

#8? Same — no gills.

#7? Big spotted one — no gills → adult

#11? Striped pattern — no gills → adult

But wait — what about #4 and #5?

Looking again:

- #4: Small, smooth, no gills → likely juvenile or early adult
- #5: Very slender, almost worm-like, no gills shown → might be a type of larva that lost gills? Or a different species.

Actually, in many textbooks, only those with visible external gills are labeled as larvae.

Also, note that some salamanders keep gills into adulthood (neotenic), like axolotls — so #6 and #10 might represent neotenic adults OR true larvae.

But since this is likely a basic classification task, we’ll assume:

If it has external gills → larva
If no gills → adult

So:

Larvae: #6, #10
Adults: all others? That seems too few.

Wait — look at #9: It has small tufts near the head — could those be developing gills? Maybe.

Actually, let me check common examples:

In many such figures:

- Figures with “feathered” structures behind head = larvae
- Others = adults

So:

Definite larvae:
→ #6 (big gills)
→ #10 (gills present)

Possibly also:
→ #9? Has small projections — maybe early gill development? Unclear.

But to be safe, stick with clear cases.

Another clue: tail shape. Larvae often have taller, finned tails for swimming.

Look at #6 and #10 — both have broad, flat tails typical of aquatic larvae.

Others have narrower tails.

Also, #5 has a very long, thin tail — might be larval, but no gills drawn.

Perhaps the key is just presence of gills.

Final decision:

Only #6 and #10 clearly show external gills → these are larvae.

All others lack them → adults.

But wait — what about #4? It looks like a newly hatched salamander — sometimes called "eft" stage, which is terrestrial juvenile — still not adult, but not larva either.

This is getting complicated.

Maybe the question is simpler: count how many have gills.

From visual inspection:

- #6: yes
- #10: yes
That’s two.

Is there any other?

Look at #9 — above the front legs, there are small bumps — could be rudimentary gills? In some drawings, even small ones count.

But unless specified, better to go with obvious ones.

Alternatively, perhaps #5 is a larva because it's very underdeveloped.

I think for school level, they expect you to spot the ones with gills.

So final answer should be: Drawings 6 and 10 are larvae.

But let’s double-check numbering.

Image labels:

Top row: 1, 2
Then 3 below them
Then 4 and 5 side by side
Then 6 alone
Then 7
Then 8 and 9
Then 10
Then 11

Yes.

So larvae: 6 and 10

Therefore, the answer is 6 and 10.

But the problem didn't specify what to do — maybe list the numbers?

Since user said “solve the problem”, and given context, likely identify which are larvae.

Assuming that’s the task.

Final Answer:
6, 10