Cattle egrets hitch a ride on domestic cows and eat insects that are stirred up by their activity. what term describes this relationship?

Ans.

Biological  interactions include different types of interactions between organisms that reside together in a community.

Cattle egrets show interaction with domestic cows and feed on the insects present in them. The cattle egrets get food from the cows, while there is no benefit or harm to the cows. This type of biological relationship is known as commensalism, in which one organism, out of interacting organisms, get benefit, while other organism neither harmed or benefit.  

Thus, the term that describes this relationship is 'commensalism.'

correct answer is a. and d.