Final answer:
Most ecosystems derive their energy from the sun, primarily through photosynthesis, which in turn sustains the entire ecosystem.
Explanation:
Most ecosystems get their energy from the sun. Producers such as green plants use sunlight to make usable energy through photosynthesis. This energy is then transferred to consumers through the food chain.
Learn more about Photosynthesis here:
https://brainly.com/question/29764662
