Fact 1: Mammals have a layer of fat under the skin to help insulate the body.

Fact 2: When stored in the body, fat helps maintain body temperature by acting as an insulator.

Given the two facts above, answer the question "What do mammals have that help maintain temperature?" with the following options: 
- body
 - bone
 - skin
 - fur
 - hair
 - wool
 - Fat
 - coat


 

       Fat  