Select the odd one with respect to the functional aspect of the ecosystem.

Options

A. Decomposition
B. Energy flow
C. Nutrient cycling
D. Species composition

Answer

To solve the question, "Select the odd one with respect to the functional aspect of the ecosystem," we can follow these steps:

### Step 1: Understand the Ecosystem
An ecosystem consists of both biotic (living) and abiotic (non-living) components that interact with each other. The functional aspects of an ecosystem refer to the processes and interactions that occur within it.

**Hint:** Remember that functional aspects are about processes, while structural aspects relate to the composition and organization of the ecosystem.

### Step 2: Identify Functional Aspects
The functional aspects of an ecosystem include:
- **Energy Flow:** The transfer of energy through various trophic levels.
- **Decomposition:** The breakdown of organic matter, returning nutrients to the soil.
- **Nutrient Cycling:** The movement and exchange of organic and inorganic matter back into the production of living matter.

**Hint:** Think about processes that involve interactions and transformations within the ecosystem.

### Step 3: Identify Structural Aspects
On the other hand, structural aspects of an ecosystem include:
- **Species Composition:** The variety and abundance of species in a given area.
- **Topography:** The physical features of the land.

**Hint:** Structural aspects are more about the 'who' and 'what' in an ecosystem rather than the 'how' and 'why'.

### Step 4: Analyze the Options
Now, let's analyze the options provided:
1. **Decomposition** - Functional aspect
2. **Energy Flow** - Functional aspect
3. **Nutrient Cycle** - Functional aspect
4. **Species Composition** - Structural aspect

**Hint:** Look for the option that does not fit with the others in terms of being a process.

### Step 5: Conclusion
From the analysis, we can conclude that:
- The first three options (Decomposition, Energy Flow, Nutrient Cycle) are all functional aspects of the ecosystem.
- The last option (Species Composition) is a structural aspect.

Therefore, the odd one out with respect to the functional aspect of the ecosystem is **Species Composition (Option D)**.

**Final Answer:** D) Species Composition