Organisms that can produce their own food are called autotrophs. The most common type of autotrophs are plants, which use a process called photosynthesis.

Here's how it works:

* Sunlight: Plants absorb sunlight through their leaves.

* Carbon dioxide: Plants take in carbon dioxide from the air through tiny openings called stomata.

* Water: Plants absorb water from the soil through their roots.

* Photosynthesis: Inside the plant's leaves, sunlight, carbon dioxide, and water are combined in a complex chemical reaction to create glucose (a type of sugar) and oxygen. The glucose provides energy for the plant, and the oxygen is released into the atmosphere.

Other examples of autotrophs:

* Algae: These simple aquatic organisms also use photosynthesis to produce food.

* Cyanobacteria: These single-celled organisms are also photosynthetic and are very important in the ocean ecosystem.

Let me know if you have any other questions!