Parasitism
(a) Parasitism is a relationship between two types of organisms in which one organism benefits while the other is harmed.
(b) Parasites benefit by living in or on the host. On the other hand, the host is harmed by the parasites.
(c) Tapeworm is a parasite that obtains food shelter from humans. Humans (the host) are harmed by losing nutrients to the parasite. The host loses weight and becomes weak.
(d) other examples of parasites are fleas, ticks and lice. These animals live off the blood of the host.