Biology

The correct answer is: A.Mutualism.

In this relationship:

1.The plover bird benefits by eating parasites off the crocodile's skin, getting a source of food.

2.The crocodile benefits because the plover helps clean its skin by removing parasites, which can be harmful or irritating.

3.The plover also benefits from the crocodile's protection from predators, as the crocodile's size and strength help keep potential threats away.

This is a mutualistic relationship because both the plover and the crocodile gain benefits from the interaction:

The plover gets food and protection.

The crocodile gets its skin cleaned and rid of parasites.