You are presented with the quiz "Leaves are covered with what, which is used to store water in plants?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "waxy leaves are used for storing water by some plants" and "leaves are covered with a waxy layer, the cuticle , which prevents water loss". 

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


 

  a cuticle         