-Priyanti, Subject Matter Expert at Edumarz
Solution: The birds have a series of modifications that enable their flight including the following:
They have a streamlined or spindle-shaped body that help minimise resistance during flight.
Their forelimbs are modified into wings, thus enabling flight.
Their body is covered with feathers and the ones in their wings and tail enable flight. Besides, they keep the bodies warm.
They have a pneumatic endoskeleton so that their body is light and they easily take flight. They have light and spongy bones because of the presence of air cavities.
They have strongly developed flight muscles or breast muscles, and keeled sternum for its attachment.
They have additional air sacs to supplement respiration.