Answer :
Most energy in an ecosystem originally comes from the sun.
Hope this helped :)
Hope this helped :)
Answer;
-Sun
Explanation;
-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. This establishes the beginning of energy flow through almost all food webs.
-Nearly all of the energy that drives ecosystems ultimately comes from the sun. Solar energy, which is an abiotic factor, the energy enters the ecosystem through the process of photosynthesis, which is the process by which producers make their own food, using energy from the sun, carbon dioxide and water.