You are presented with the question "Living beings in marine biomes must be adapted to what in the water?" and the following answer choices: 
- CO 2
 - stress
 - liquid
 - salt
 - heat
 - an ion
 - energy
 - motion

Now knowing that organisms that live in marine biomes must be adapted to the salt in the water and organisms or living beings are literally things that are alive, choose the best answer.


 

    salt     