Atapeworm lives off the nutrients in an animal’s digestive tract. therefore, a tapeworm is

Parasite.

Explanation: Tapeworm are the intestinal parasite that looks like measurement tape. It lives inside the body of the host cell.

Tapeworms cannot survive by its own. it survives within the gut of the animals or human beings.

It gets inside the body of human being mainly via uncooked food, and starts growing in the gut of human beings. They get nutrition from the food that we eat.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.