PDF chapter test TRY NOW
Mention the feature that help a bird to fly is the air?
a. Birds have a that is covered with feathers.
b. The body shape of the birds to air during flight.
c. The of the birds are well-developed and modified into wings for flying.
d. They have that contain air cavities and thus are . These bones reduce the body weight of the birds.
e. Birds have strong and well-developed that help withstand the air pressure while flapping the wings during flight.
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