The sun is a nonliving part of an ecosystem that plays a major role in the cycling of energy by providing the primary source of energy for all living organisms through the process of photosynthesis. Plants, algae, and some bacteria use sunlight to convert carbon dioxide and water into glucose, which is used as energy for growth and metabolism. This process forms the basis of the food chain as other organisms rely on these primary producers for energy. Additionally, the sun's energy also drives weather patterns, which in turn influence the distribution of energy and resources within an ecosystem. Thus, the sun is essential for maintaining the flow of energy throughout an ecosystem.
