Respuesta :
Answer: The correct answer is- One species uses another species as food or shelter causing harm.
Parasitism is a biological relationship between two organisms belonging to different species in which one organism ( called parasite) lives on the surface or inside the body of another organism ( that is called host) as a source of food, shelter, and reproduction, thus completing its life cycle.
This means that one organism ( that is parasite ) is benefited at the expense of host organism.