Which one of the following is NOT an example of commensalism?

Cuckoo and the crow

The correct answer is Option (4) → Cuckoo and the crow

Brood parasitism in birds is a fascinating example of parasitism in which the parasitic bird lays its eggs in the nest of its host and lets the host incubate them.e.g. the movements of the cuckoo (koel) and the crow during the breeding season (spring to summer) and watch brood parasitism in action.

Commensalism: This is the interaction in which one species benefits and the other is neither harmed nor benefited.It is a mutually indifferent relationship, where one species benefits from the interaction without causing any harm or benefit to the other species involved.In commensalism, the species that benefits may obtain resources, support, or protection from the interaction, while the other species remains unaffected.

An orchid growing as an epiphyte on a mango branch, and barnacles growing on the back of a whale benefit while neither the mango tree nor the whale derives any apparent benefit. Sea anemone and the clown fish shows commensalism.

The cattle egret and grazing cattle in close association, a sight you are most likely to catch if you live in farmed rural areas, is a classic example of commensalism.