Animals that need water
Don't really understand your question, but I will try. Any animal that still has surviving members is not extinct. An easier answer for you would be to go to your library, and check out books on extinct animals.
If all animals go extinct there will be no need for food!
Animals go extinct for many reasons, but the main one being loss of habitat.
Humans are the answer! humans caused more animals to go extinct than any other animal.
Without mangroves many fish, shore animals and birds would go extinct.
Of course humans cause animals to go extinct
Some animals go into underground burrows, some animals simply hide out in the shade of desert trees and shrubs.
That is an impossible situation. We are an animal also. What would kill them off would kill us also.
The animal population would tend to go "extinct" -Dr. Bosch
If the other animals are able to adapt they live or else they go extinct.
When they go extinct or are about to go extinct, they are called endangered. This usually happens when there is a widespread famine, drought, etc.
If a certain animals, say, a tiger, were to die/go extinct. Their prey would overpopulate and throw several ecosystems off track. It would be like a domino effect.