You are presented with the quiz "What helps to keep the body warm and protect it in a variety of climates?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "hair helps to insulate and protect the body" and "hair is used to insulate and keep the body warm in a large variety of climates". 

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


 

        hair   