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Five uses of protists are:

1. Protists are important manufacturers of oxygen.
2. Protists cause the decay of organisms.
3. Algae, a protist, serves as habitat for sea urchins and other marine animals
4. Algae is also used for food by people.
5. Another use of algae is that it is used in extracts for making cosmetics, ice cream, and many more.
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