Fact 1: Feathers help birds fly and provide insulation.

Fact 2: To survive the chill, warm-blooded penguins rely on feathers and fat for insulation.

Given the two facts above, answer the question "Birds do what using the feathers that help them to fly?" with the following options: 
- to move people
 - running and lifting
 - survive the chill
 - during the day
 - Move to another area
 - Earth orbiting the Sun
 - to stay warm
 - supersonic


 

   survive the chill      