Question

write two main features of bird which enable them to fly​

Answer 1

Explanation:

Flying birds have: lightweight, smooth feathers – this reduces the forces of weight and drag. a beak, instead of heavy, bony jaws and teeth – this reduces the force of weight. an enlarged breastbone called a sternum for flight muscle attachment – this helps with the force of thrust...

Answer 2

Answer:

Light weight

smooth feathers