Final answer:
An ecosystem is a natural unit where living organisms interact with the environment. It includes both biotic and abiotic factors working together. Forest ecosystems exemplify diverse interdependent relationships.
Explanation:
An ecosystem is a natural unit where all living organisms in an area interact with the nonliving physical factors of the environment. It consists of biotic and abiotic factors working together in harmony. For instance, a forest ecosystem includes trees, mosses, insects, deer, rocks, and sunlight, forming a coexisting community of interdependent relationships.
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