Which of the following is a functional aspect of ecosystem?

Options

A. Species composition
B. Inorganic nutrients
C. Homeostasis
D. Topography

Explanation

To determine which of the following is a functional aspect of an ecosystem, we need to analyze the options provided.

### Step-by-Step Solution:

1. **Understanding Functional Aspects of Ecosystem**:
- Functional aspects of an ecosystem refer to the processes and interactions that occur within the ecosystem that contribute to its overall functioning and sustainability.

2. **Evaluating the Options**:
- **Option 1: Species Composition**:
- Species composition refers to the variety and abundance of different species in a community. While it is important for biodiversity, it does not directly describe how the ecosystem functions. Therefore, it is not a functional aspect.

- **Option 2: Inorganic Nutrients**:
- Inorganic nutrients are essential for the growth and development of plants and animals. They play a crucial role in the ecosystem's productivity but are more about the resources available rather than a functional process.

- **Option 3: Homeostasis**:
- Homeostasis is the process by which living organisms maintain a stable internal environment despite external changes. This is a functional aspect because it reflects how organisms interact with their environment to sustain life.

- **Option 4: Topography**:
- Topography refers to the physical features of the land. While it influences the ecosystem, it is not a functional aspect as it does not describe a process or interaction.

3. **Conclusion**:
- Based on the analysis, the correct answer is **Option 3: Homeostasis**, as it represents a functional aspect of the ecosystem.