The functional unit of nature is called

Options

A. Community
B. Ecosystem
C. Population
D. Succession

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the functional unit of nature. We need to identify which option correctly describes this concept.

2. **Analyzing the Options**:
- **Option 1: Community**: A community refers to a group of different species living together in a particular area. While important, it does not encompass the non-living components of nature.
- **Option 2: Ecosystem**: An ecosystem includes both the living (biotic) and non-living (abiotic) components of nature and their interactions. This makes it a comprehensive unit of nature.
- **Option 3: Population**: A population is a group of individuals of the same species living in a specific area. Like community, it does not include abiotic factors.
- **Option 4: Succession**: Succession refers to the process of change in the species structure of an ecological community over time. It is a process rather than a functional unit.

3. **Identifying the Correct Answer**: Based on the definitions and the interactions involved, the ecosystem is the functional unit of nature as it includes both biotic and abiotic components and their interactions.

4. **Conclusion**: Therefore, the correct answer is **Option 2: Ecosystem**.

---