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

Fact 2: Clean water is also essential to aquatic life.

Given the two facts above, answer the question "What does a water animal need great amounts of to survive?" with the following options: 
- Au
 - sodium
 - oxygen
 - gills
 - water
 - warmth
 - Fe
 - H


 

     water    