Answer:
C. Human and mosquito
Step-by-step explanation:
Parasitism, one organism, the parasite, gains benefit and the other organism, the host, is harmed. The parasite lives in or on the host and often has a vector or intermediate host which is unharmed by the parasite. The parasite usually reproduces inside the intermediate host and this increased the parasite’s chances of survival and transmission.
Mosquitoes drink human blood, which causes humans to get itchy and can even get them sick.