Respuesta :

Answer: sun  

Explanation:

3.1 The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water.

Answer:

I believe that the sun is the main source of energy .. it is a source of energy for plants that are eaten by animals other than eating meat. As for animals that eat meat, they feed on other animals .. I believe that the beginning of the chain is the sun