You are presented with the quiz "Organisms that live in marine biomes must be adapted to what?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "organisms that live in marine biomes must be adapted to the salt in the water" and "salinity is a measure of how much salt is in the water". 

So, what's the best answer to the question?


 

      Salinity     