Question

why do the bodies of birds and fishes must habe special shape​

Answer 1

Explanation:

Birds and the fishes have to move about in fluids all the times. Their bodies must have evolved to shapes which would make them not to lose much energy in overcoming friction. Such shapes are called streamlined.

Answer 2

Answer:

Yes the body of fishes and birds are shaped in a special way. And this shape is called streamlined shape. It helps both fish as well as birds to move easily in water,air. streamlined shape offers less resistance thus helping them move freely.