Final answer:
An endoparasite lives inside the body of the host, relying on it for nourishment and habitat.
Step-by-step explanation:
An endoparasite is an organism that lives inside the body of the host. Examples of endoparasites include hookworms, which can live in the small intestine and lungs of humans, causing pain and discomfort. Endoparasites, such as tapeworms and certain types of bacteria, rely on the host for nourishment and a habitat, often having complex life cycles that necessitate adaptation to the host's internal environment.