Question

while flying, the birds push the air​

Answer 1

Answer:

The wings push air down, so by Newton's third law the air must push them up. Partly, the push comes from the angle the wings are held at and partly from the curvature of the wings. The air travels faster above the bird's wing than it does below, and this makes the pressure lower above the wing.

Explanation:

hence proved

Answer 2

Answer:

thish is mothing bit fluid friction the birds have special shapes which is required for flying