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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