Final answer:
An ecosystem is a term used to describe the interaction of living (biotic) and non-living (abiotic) factors in a given area, encompassing the full range of entities and their environmental interactions.
Step-by-step explanation:
An ecosystem includes all the living organisms (biotic factors) such as plants, animals, fungi, and microorganisms, as well as all the non-living (abiotic factors) such as temperature, water, soil, and air. The term 'ecosystem' represents the interaction of these biotic and abiotic components in a given area, which can vary in size from something as small as a tide pool to something as expansive as the Amazon Rainforest.