Compare parasitism, mutualism, and commensalism.

Parasitism:

Parasitism may be defined as a type of biological interaction in which the individual gets benefit from the host. The species may affect the host and directly obtain their nutrition from the host.

Mutualism:

Mutualism is a type of biological interaction in which both the species get benefit. This is a type of positive interaction in which both the species are not harmed.

Commensalism:

Commensalism is a type of biological interaction in which one species is benefited and other species is neither benefited nor harmed. This is also a type of positive interaction.