You are presented with the quiz "What in the scalp is especially important in preventing heat loss from the body?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "head hair is especially important in preventing heat loss from the body" and "although hair is created by living follicles in the scalp, it's dead". 

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


 

      living follicles     