An organism that lives on or in a host, and caused it harm while it takes its nutrients is called:

Answer: parasite
Explanation

A parasite is an organism that lives on or in a host organism and gets its food from or at the expense of its host.

There are three main classes of parasites that can cause disease in humans:
protozoa,
helminths,
and ectoparasites.

ND06-08-2023



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