Which of the following is a functional aspect of an ecosystem?

Options

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

Answer

To determine which of the following is a functional aspect of an ecosystem, we need to analyze each option provided:

1. **Species Composition**: This refers to the variety and abundance of different species within an ecosystem. It is primarily a structural aspect as it describes the biological makeup of the ecosystem rather than its functions.

2. **Inorganic Nutrients**: These are essential elements and compounds that organisms need for growth and development, such as nitrogen, phosphorus, and potassium. While they are crucial for the ecosystem, they are also considered a structural aspect as they contribute to the ecosystem's composition.

3. **Homeostasis**: This refers to the ability of an ecosystem to maintain stability and balance despite changes in the environment. It involves processes that regulate internal conditions, such as temperature and nutrient concentrations. Homeostasis is a functional aspect because it pertains to the ecosystem's ability to function effectively over time.

4. **Topography**: This involves the physical features of the landscape, such as mountains, valleys, and slopes. Like species composition and inorganic nutrients, topography is a structural aspect of the ecosystem as it describes the physical layout rather than the functional processes.

Based on this analysis, the correct answer is **Homeostasis**, as it represents a functional aspect of an ecosystem.

### Step-by-Step Solution:
1. **Identify the options**: Species composition, inorganic nutrients, homeostasis, and topography.
2. **Analyze each option**:
- Species composition: Structural aspect.
- Inorganic nutrients: Structural aspect.
- Homeostasis: Functional aspect.
- Topography: Structural aspect.
3. **Determine the functional aspect**: Homeostasis is the only option that describes a functional aspect of an ecosystem.
4. **Conclude the answer**: The correct answer is **Homeostasis**.