Final answer:
An ecosystem consists of all the living and nonliving things interacting in the same area. It is composed of both biotic and abiotic components.
Step-by-step explanation:
An ecosystem consists of all the living things and nonliving things interacting in the same area. It is composed of both biotic components (living things) and abiotic components (nonliving things) such as air, water, soil, and climate. Ecosystems are linked together by flows of energy and cycles of nutrients through the system.