You are presented with the quiz "What has a layer of fat under the skin to help insulate the body?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "mammals have a layer of fat under the skin to help insulate the body" and "of the sea mammals, especially the seal and walrus are hunted". 

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


 

 walruses          