Question

explain in brief why birds that walk on the leaves floating on the surface of water have wide feet.

Answer 1

The birds that walk on leaves floating in water have wider feet because,

when their feet has larger area there is less pressure applied on the leaf.

Pressure=Force/Surface Area

pressure is inversely proportional to the surface area, therefore they have wider feet so that they don't sink the leaf with them.

Answer 2

This is because wide feet increases the area of contact with the leaves. So they exert less pressure on the leaves, allowing them to walk on these leaves.