Define ecosystem.

An ecosystem is a community of living organisms interacting with each other and their physical environment. This includes plants, animals, and microorganisms, as well as the non-living components such as air, water, and soil. Ecosystems can vary in size and complexity, ranging from a small pond to a vast forest. Each ecosystem is unique and plays a vital role in maintaining the balance of nature.

An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment (things like air, water and soil), interacting as a system.