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Explanation:
We need to identify the cause (what happens first — the reason *why* something happened) and the effect (what happens after — the result). The cause tells us *why*, and the effect tells us *what happened*.

Let’s go sentence by sentence:

1. *It was sunny, so Rick put on a hat.*
- Cause: It was sunny (this happened first — the reason)
- Effect: Rick put on a hat (this happened because of the sun)

2. *Mia stayed in class because she didn’t finish her work.*
- Cause: She didn’t finish her work
- Effect: Mia stayed in class

3. *It was Saturday, so we went to football training.*
- Cause: It was Saturday
- Effect: We went to football training

4. *Wendy took photos to class because she went on a trip.*
- Cause: She went on a trip
- Effect: Wendy took photos to class

5. *If the kids do their jobs, they get pocket money.*
- This is a conditional (if–then), but still:
Cause: The kids do their jobs
Effect: They get pocket money

6. *Mat left the door open, and the dog ran away.*
- Cause: Mat left the door open
- Effect: The dog ran away

7. *If it is too hot, we put the fan on.*
- Cause: It is too hot
- Effect: We put the fan on

8. *Jill had cake because it was her birthday.*
- Cause: It was her birthday
- Effect: Jill had cake

Now, per instructions:
- Underline the cause in green
- Underline the effect in red

Since we’re writing text (not coloring), we’ll indicate:
- [Cause] for green
- [Effect] for red

So the answers are:

1. [Cause] It was sunny, so [Effect] Rick put on a hat.
2. [Cause] Mia didn’t finish her work, so [Effect] Mia stayed in class.
3. [Cause] It was Saturday, so [Effect] we went to football training.
4. [Cause] Wendy went on a trip, so [Effect] she took photos to class.
5. [Cause] The kids do their jobs, so [Effect] they get pocket money.
6. [Cause] Mat left the door open, and [Effect] the dog ran away.
7. [Cause] It is too hot, so [Effect] we put the fan on.
8. [Cause] It was her birthday, so [Effect] Jill had cake.

Note: In sentences with “because” or “so”, the part before “because” or after “so” is usually the effect — but be careful! Actually:
- “X because Y” → Y is cause, X is effect
- “X so Y” → X is cause, Y is effect

Let’s double-check each using that rule:

1. *It was sunny, so Rick put on a hat.* → “It was sunny” = cause; “Rick put on a hat” = effect ✔
2. *Mia stayed in class because she didn’t finish her work.* → “she didn’t finish her work” = cause; “Mia stayed…” = effect ✔
3. *It was Saturday, so we went…* → cause = It was Saturday ✔
4. *Wendy took photos… because she went on a trip.* → cause = she went on a trip ✔
5. *If the kids do their jobs, they get pocket money.* → cause = kids do jobs; effect = get money ✔
6. *Mat left the door open, and the dog ran away.* → cause = left door open; effect = dog ran away ✔
7. *If it is too hot, we put the fan on.* → cause = too hot; effect = put fan on ✔
8. *Jill had cake because it was her birthday.* → cause = it was her birthday; effect = Jill had cake ✔

All correct.

Final Answer:
1. Cause: It was sunny — Effect: Rick put on a hat
2. Cause: She didn’t finish her work — Effect: Mia stayed in class
3. Cause: It was Saturday — Effect: We went to football training
4. Cause: She went on a trip — Effect: Wendy took photos to class
5. Cause: The kids do their jobs — Effect: They get pocket money
6. Cause: Mat left the door open — Effect: The dog ran away
7. Cause: It is too hot — Effect: We put the fan on
8. Cause: It was her birthday — Effect: Jill had cake