Which one of the following is not correct match of the term and its description?

Options

A. `{:("Ecosystem",-,"Functional unit of nature"):}`
B. `{:("Global ecosystem",-,"Entire biosphere"):}`
C. `{:("Aquatic ecosystem",-,"Wetland"):}`
D. `{:("Natural ecosystem",-,"Crop field"):}`

Explanation

To solve the question regarding which term and description match is incorrect, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Identify the Terms and Descriptions**: We need to look at the four terms provided and their corresponding descriptions.

2. **Evaluate Each Option**:
- **Option A: Ecosystem**: An ecosystem is indeed made up of biotic (living) and abiotic (non-living) components that are linked through nutrient cycles and energy flow. This description is correct.
- **Option B: Global Ecosystem**: The global ecosystem encompasses all ecosystems on Earth, including the lithosphere, geosphere, atmosphere, and biosphere. This description is also correct.
- **Option C: Aquatic Ecosystem**: The aquatic ecosystem is divided into marine and freshwater ecosystems, and wetlands are indeed a part of this category. This description is correct as well.
- **Option D: Crop Field**: A crop field is a man-made ecosystem, created through human intervention, and is not a natural ecosystem. This description is incorrect as it states that it is a natural ecosystem.

3. **Conclusion**: After evaluating all the options, we find that the incorrect match is **Option D**: Crop Field is not a natural ecosystem; it is a man-made ecosystem.

### Final Answer:
The option that is not a correct match of the term and its description is **Option D: Crop Field**.

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