Question

oxpecker birds travel on the backs of large mammals such as the rhino and feed on the parasites that are burrowing into the animals backs. (rhino & bird)
mutualism
commensalism
parasitism

Explanation:

Mutualism is a symbiotic relationship where both species benefit. The oxpecker birds get food (parasites) and the rhino gets parasite - removal. Commensalism is when one species benefits and the other is unaffected. Parasitism is when one organism (parasite) benefits at the expense of the other (host). Here, both rhino and bird benefit.

Answer:

mutualism