Fact 1: Thick fur can be used for keeping warm.

Fact 2: Otters have thick fur coats and whiskers.

Given the two facts above, answer the question "otters need their what to keep warm" with the following options: 
- rocks
 - fats
 - Limbs
 - feet
 - drift wood
 - hair
 - coats
 - seaweed


 

       coats  