You are presented with the quiz "What do Xerophytes do to adapt to dry environments?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "plants that are adapted to very dry environments are called xerophytes" and "plants that have adapted by altering their physical structure are called xerophytes ". 

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


 

      alter their physical structure     