You are presented with the quiz "Evaporation can be used to move a solvent apart from:" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "evaporation can be used for separating a solute from a solvent in a solution" and "girls and boys residences are separate and far apart". 

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


 

        a solute   