Feathers help birds fly and provide insulation.
To survive the chill, warm-blooded penguins rely on feathers and fat for insulation.
Birds survive the chill using the feathers that help them to fly.
Birds do what using the feathers that help them to fly?
(1) to move people
(2) running and lifting
(3) survive the chill
(4) during the day
(5) Move to another area
(6) Earth orbiting the Sun
(7) to stay warm
(8) supersonic