Question

remora have an adhesive disk which they use to attach themselves to whale sharks. they feed on the remains from the whale shark’s food. the sharks are unaffected.
parasitism
commensalism
mutualism

Explanation:

Parasitism involves one organism harming the other. Mutualism is when both organisms benefit. Commensalism is where one organism benefits and the other is neither helped nor harmed. Here, remora benefit by feeding on remains while whale - sharks are unaffected, which is commensalism.

Answer:

B. commensalism