Answer
(c) Parasitism (e) Pathogen (a) Symbiosis (f) Commensalism (d) Host (b) Mutualism
Work Step by Step
Parasitism - occurs when only one organism benefits from the relationship and the other is harmed
Pathogen - defined as a parasite capable of causing disease in a host
Symbiosis - defined as an association between two or more species.
Commensalism- occurs when two species living together in a relationship such that one benefits and the other neither benefits nor is harmed.
Host - defined as any organism that harbors another organism.
Mutualism- occurs when both members of the association benefit from the relationship