Organisms like protists that can do various processes to
gain
food and
energy are known
as;

The answer is protozoa.

Explanation:

Like cattle, other species are eaten by heterotrophic protists to acquire their nutrition. This protists are called "protozoa," meaning "first animal." Protozoans feed by a mechanism called "phagocytosis," in which they cover and trap their food within a vacuole with their cell membrane.

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