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

Fact 2: Insulated model provides warmth and comfort.

Given the two facts above, answer the question "Mammals have a layer of fat under the skin to provide what?" with the following options: 
- food and shelter
 - electrolytes
 - food and water
 - warmth and comfort
 - staying warm
 - starvation mode
 - protect them
 - Animal survival


 

    warmth and comfort     