explain how parasitism differs from commensalism.

Parasitism differs from commensalism in that parasitism is a relationship where one organism benefits while the other organism is harmed, whereas in commensalism, one organism benefits and the other is neither helped nor harmed. In parasitism, the parasite depends on the host for resources, often causing damage or harm to the host organism. In commensalism, the host is unaffected by the presence of the other organism, which benefits from the relationship without causing harm. For example, tapeworms in humans exhibit parasitism by benefiting at the host's expense, while remora fish benefiting from rides on sharks without affecting the shark is an example of commensalism.