Parasitism

Parasitism is when a parasite organism feeds on a host organism and takes its nutrients. The types of parasites are exoparasites (latch onto outside of the host) and endoparasites (latch onto inside of the host).

Mutualism

Mutualism is a mutually beneficial form of symbiosis in which two organisms help each other. In obligate mutualism, one/both organisms cannot survive without each other, while in facilitative mutualism, both organisms can survive without each other.