Question

помогите пожалуйста ......​

Answer 1

2. If people don’t know about it, they won’t come and help
3. If they don’t clean up the beach, it will be full of rubbish
4. If the beach is full of rubbish, it will be dangerous for green turtles

Answer 2

2 If people don't know about it, they won't come and help

3 If they don't clean up the beach, it will be full of rubbish

4 If the beach is full of rubbish, it will be dangerous for green turtles

First Conditional

If + Present Simple, will + infinitive