Which of the following can be represented as a functional unit of nature?

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Accepted Answer

Step-by-step explanation:

1. Definition: A "functional unit of nature" is a unit in which biotic (living) and abiotic (non-living) components interact and function together as a whole.

2. Evaluate options:
   - Vehicles: man-made objects, not a natural unit of interacting biotic–abiotic components.
   - Ecosystem: by definition, an ecosystem comprises organisms plus their physical environment interacting as a functional unit of nature.
   - Humans: individual organisms (components) but not the full interacting unit that includes environment and multiple species.
   - Plants: likewise are organisms (components) but not the entire interacting unit.

3. Conclusion: Only (2) Ecosystem fits the definition of a functional unit of nature.

FINAL_ANSWER: b

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