Kudzu, an asian vine introduced to the united states in the 1930s as a means to control erosion, is referred to as "the plant that ate the south" because it grows so fast and overtakes most plant species in its path. a recent and unusual way that some people are using to control kudzu growth is to allow goats to graze their land and eat the kudzu, roots and all. this is considered by some to be the most environment-friendly way to eliminate this invasive vine. how can we best describe the goats in this situation?

The correct answer will be- a biological control agent

Explanation:

Biological control is the method of controlling the harmful or useless organism using biological agents. The harmful organism which should be removed includes the pests, weeds, mites and other organisms whereas the agents which control this biological organism are called control agents.

The relationship of control depends on the ecological relationship between two organisms which could be prey-predator, herbivory and parasitism.

In the given question, since the goat help, the fields get rid of kudzu which involves the herbivory interaction and helps control the kudzu therefore, a biological control agent is the correct answer.