Question

deer often have ticks and other insects in their coat of fur sucking their blood. what type of relationship do the deer and ticks exhibit?
commensalism
mutualism
parasitism

Explanation:

In parasitism, one organism (parasite) benefits at the expense of another (host). Ticks benefit by sucking deer's blood, harming the deer. Commensalism is when one benefits and the other is unaffected, and mutualism is when both benefit.

Answer:

Parasitism