Question

the body of birds and fishes are shaped in a special way. describe the shape and the advantage of such a shape

Answer 1

The bodies of fish and birds are streamlined. This shape reduces the resistance of the air, commonly known as friction drag. The resistance slows down the speed. Thus, because of this shape, birds and fish able to glide smoothly through air and water respectively, as it allows the medium to flow swiftly along the sides of the body.

Answer 2

birds and fishes have streamline bodies
so that the birds can reduce air drag
and fishes can reduce Warter friction (viscosity)