a relationship in which one species benefits and the other is harmed is\nmutualism.\ncooperation.\ncommensali…

Brief Explanations:

Mutualism is when both species benefit. Cooperation also implies mutual - benefit. Commensalism is when one species benefits and the other is neither helped nor harmed. Parasitism is a relationship where one species (the parasite) benefits and the other (the host) is harmed.

Answer:

parasitism.