You are presented with the quiz "What must be adapted to salt water?" 

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 "tiny marine organisms are thus captured by the baleen, and then swallowed by the whale". 

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


 

        whales   