What are the 3 methods that protists use to obtain food?

Protists obtain food through three primary methods: autotrophy, heterotrophy, and mixotrophy. Autotrophic protists, like algae, use photosynthesis to convert sunlight into energy. Heterotrophic protists, such as amoebas, ingest food particles through processes like phagocytosis. Mixotrophic protists can combine both methods, utilizing photosynthesis when light is available and consuming organic matter when it is not.