Brood parasitism is found in

Correct option is B

brood parasitism is found in birds where a parasitic bird Lays its eggs in the nest of its host and let the host incubate them, for example Kukoo here is a parasite, Lays its eggs in crows, (here is a host) nest, during the course of evolution, the eggs of parasitic birds have evolved to resemble the host egg in size and colour to reduce the chances of the host ejecting the foreign eggs and rejecting them from the nest.