Fact 1: Insulated material can be used for keeping warm.

Fact 2: Hair is a natural insulator whether the it is warm or cool.

Given the two facts above, answer the question "what can keep you warm?" with the following options: 
- toenails
 - warmth
 - skin
 - nails
 - wings
 - fingers
 - fur
 - hair


 

        hair 