Brood parasites are organisms that rely on others to raise their young. The strategy appears among a wide variety of animals, including insects, fishes, and birds. A common strategy of the brood parasite is to trick a host parent to raise the parasite’s young as if it belonged to the host.
For example, the cuckoo will lay its egg in nests belonging to the reed warbler seemingly with the intent for the warbler to hatch and feed the cuckoo hatchling.
Which of the following is the MOST plausible benefit for the parasite?