Feathers help birds fly and provide insulation, and to survive the chill, warm-blooded penguins rely on feathers and fat for insulation. Given these facts, birds do what using the feathers that help them to fly among 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      