Final answer:
A human and a tapeworm exhibit a parasitic relationship, where the tapeworm benefits at the host's expense. Tapeworms feed off the host's nutrients and can live for years within the human intestines. This interaction is harmful to humans as it can lead to nutrient loss and diseases.
Step-by-step explanation:
The relationship between a human and a tapeworm is an example of parasitism. In parasitism, the parasite benefits while the host is harmed. Tapeworms live in the intestines of humans, gaining nutrients and a place to live, but at the expense of the human host who may lose weight and nutrients. The tapeworms may grow quite long and can live for years inside the host. These parasites have complex reproductive cycles that often require more than one host species to complete.
Helminths, like tapeworms, are parasitic worms that can cause diseases such as infections by tapeworms, roundworms, pinworms, and hookworms. They can be contracted by consuming contaminated, undercooked meat and can reside in various organs, but primarily set within the host's intestines. While helminths draw nourishment and protection from their hosts, they also cause harm by spreading diseases.