Which term describes an organism that lives on or in another organism?

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Multiple Choice

Which term describes an organism that lives on or in another organism?

Explanation:
A parasite is an organism that lives on or in another organism and benefits at the host’s expense. This definition captures the relationship exactly: the parasite relies on the host for nutrients or shelter, often harming the host in the process. Examples include lice on a person or tapeworms in the digestive system. The other options describe groups of organisms rather than the relationship. Fungi, bacteria, and yeast are categories of life forms; some can act as parasites, but they are not the term that defines the host–parasite interaction itself.

A parasite is an organism that lives on or in another organism and benefits at the host’s expense. This definition captures the relationship exactly: the parasite relies on the host for nutrients or shelter, often harming the host in the process. Examples include lice on a person or tapeworms in the digestive system.

The other options describe groups of organisms rather than the relationship. Fungi, bacteria, and yeast are categories of life forms; some can act as parasites, but they are not the term that defines the host–parasite interaction itself.

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