You are presented with the question "What must seals be adapted to?" and the following answer choices: 
- warmth
 - Pond water
 - Fresh water
 - exercise
 - Oxygenated water
 - heat or cold
 - Salt water
 - Animal survival

Now knowing that organisms that live in marine biomes must be adapted to the salt in the water and seals live in salt water, choose the best answer.


 

       Salt water  