Fact 1: An aquatic animal requires great amounts of water to survive.

Fact 2: Fish are backboned aquatic animals.

Given the two facts above, answer the question "what requires great amounts of water to survive?" with the following options: 
- bears
 - cactii
 - fish
 - squids
 - h2o
 - Whales
 - Birds
 - atmosphere


 

   fish      