The most common example is plants, which use photosynthesis to convert sunlight, water, and carbon dioxide into glucose (sugar) for energy.

Other autotrophs include:

* Algae: Similar to plants, algae use photosynthesis to make food.

* Cyanobacteria: These bacteria also use photosynthesis.

* Chemosynthetic bacteria: These bacteria use chemical energy from inorganic compounds like hydrogen sulfide to make food.