Answer:
c) Parasitism.
Explanation:
Parasitism refers to the ecological interaction between members of two species wherein one organism (the parasite) derives benefit while the other (the host) is harmed.
In the given example, the parasite hookworm derives its nutrition from the body fluid of its host. The hookworm is getting its nutrition while the host cells are deprived of the body fluid. So, hookworm and its host represent the parasitism.