You are presented with the question "What insulates?" and the following answer choices: 
- with their fur
 - swamp vegetation
 - copper wire
 - Blankets
 - whale blubber
 - Animal fur
 - steel
 - aluminum foil

Now knowing that mammals have a layer of fat under the skin to help insulate the body and blubber, the fat of the whale, was once much sought after, choose the best answer.


 

     whale blubber    