Question

cattle egrets forage (feed) in fields among cattle. the egret gets easy access to flying insects stirred up by the cattle, and the cattle dont care if they are there or not.
competition
mutualism
predation
commensalism

Explanation:

In the relationship between cattle egrets and cattle, the egrets benefit by getting access to flying insects stirred up by the cattle, while the cattle are neither helped nor harmed. This fits the definition of commensalism.

Answer:

commensalism