Question

barnacles create home sites by attaching themselves to whales. this relationship neither harms nor benefits the whales. commensalism mutualism parasitism

Explanation:

The relationship described (barnacles on whales, neither harming nor benefiting the whale, while barnacles benefit) is commensalism. Mutualism benefits both, parasitism harms one and benefits the other. So the correct term is commensalism.

Answer:

commensalism