Fact 1: Feathers help birds fly and provide insulation.

Fact 2: Penguins keep warm with layers of insulation.

Given the two facts above, answer the question "Feathers help birds fly and " with the following options: 
- Absorb light
 - get  nutrients
 - keep warm
 - heat produced
 - find food
 - staying warm
 - maintain water
 - protect them


 

   keep warm      