Exercise of whale

Exercise of the whale
1. What is the difference between whales and fish ?
2. How do the whale breathe ?
3. How many kinds of whales ?
what are they ?
4. What are the enemies of whales ?
5. …….most of them go to cold waters to feed
What does the word feed mean ?
6. Do the whales live in the river ? why / why not ?
7. Why do they go to cold waters in summer ?
8. What is the main idea of second paragraph ?
9. Do the whales lay the eggs ? why / why not ?
10. They bear young alive
What is the Synonym of the bear ?