Question

in the figure given below the birds have spindle shaped body how does it help the birds

Answer 1

It is useful for having prey  

Answer 2

Birds have a spindle shaped body a an adaptive mechanism. This shape reduces the amount of pressure the bird experiences in flying. Marine animals also posses this characteristic and is of great benefit since it aids in swimming   by providing less resistance. The body  of a bird is  filled with feathers that add to its volume. It is also meant to ease the ability of flying