The organism that produces its own food from the sun is called a producer. They are at the bottom of the food chain.

Here's why:

* Producers are the foundation of every ecosystem. They make their own food through photosynthesis. This process uses sunlight, water, and carbon dioxide to create sugars (food) and release oxygen.

* Consumers rely on producers for their food. They cannot make their own food and must consume other organisms for energy. This includes herbivores (eat plants), carnivores (eat animals), and omnivores (eat both plants and animals).

* Decomposers break down dead organisms and waste, returning nutrients back to the soil for producers to use.

Examples of producers:

* Plants (trees, flowers, grass)

* Algae

* Some bacteria (cyanobacteria)

Let me know if you have any other questions about food chains!