Fact 1: Organisms that live in marine biomes must be adapted to the salt in the water.

Fact 2: Seals live in salt water.

Given the two facts above, answer the question "What must seals be adapted to?" with the following options: 
- warmth
 - Pond water
 - Fresh water
 - exercise
 - Oxygenated water
 - heat or cold
 - Salt water
 - Animal survival


 

       Salt water  