Respuesta :
b a parasite must have a host to stay alive. THe parasite benefits and the host is harmed
Parasites are the microorganisms that are most likely to get their main source of nutrition from a host.
Parasites:
A parasite is an organism that survives in or on another species, usually at the expense of its host.
There are three types of parasites namely ectoparasites, endoparasites, and mesoparasites.
Ectoparasites include parasites that survive outside the host and induce itching and rashes in that area. Endoparasites include parasites that survive inside the body of the host, usually in the bloodstreams, muscles, digestive system, and so on.
Mesoparasites include parasites that enter the host through an opening of the body and embed themselves partially in the host.
Thus, we can conclude that option B is correct that parasites live on the host to drive nutrition from it.
You can learn about parasites here:
https://brainly.com/question/16712707
#SPJ2