The correct option is
C Koel
Brood parasitism is when a bird lays its egg in the nest of another bird. The host bird is then responsible for raising and feeding the parasite bird chick.it is known as brood parasitism because a nest of a baby bird is called as a brood. koel is a brood parasite as it lays it's egg in crow's nest.
So, the correct answer is 'Koel'.