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

Fact 2: Dietary fats are the fats found in foods.

Given the two facts above, answer the question "What do mammals have under their skin that is used to insulate the body?" with the following options: 
- food
 - fur
 - coats
 - bread
 - solid
 - grains
 - mice
 - hair


 

 food        