Which of the following aspects is not a component of functional unit of ecosystem?

Options

A. Productivity
B. Decomposition
C. energy flow
D. Ecological pyramids

Explanation

To determine which aspect is not a component of the functional unit of an ecosystem, we need to analyze the given options: productivity, decomposition, energy flow, and ecological pyramids.

### Step-by-Step Solution:

1. **Understand the Functional Aspects of Ecosystems**:
- Ecosystems have functional aspects that describe how they operate. These include:
- **Productivity**: Refers to the rate at which energy is produced in an ecosystem, primarily through photosynthesis.
- **Decomposition**: The process of breaking down dead organic matter, returning nutrients to the soil.
- **Energy Flow**: Describes how energy moves through an ecosystem, from producers to consumers to decomposers.
- **Nutrient Cycling**: The movement and exchange of organic and inorganic matter back into the production of living matter.

2. **Analyze the Options**:
- **Productivity**: This is a functional aspect of ecosystems.
- **Decomposition**: This is also a functional aspect of ecosystems.
- **Energy Flow**: This is another functional aspect of ecosystems.
- **Ecological Pyramids**: This refers to graphical representations (like pyramids of numbers, biomass, or energy) that illustrate the relationships between different trophic levels in an ecosystem.

3. **Identify the Odd One Out**:
- Among the options, ecological pyramids do not describe a functional process within the ecosystem. Instead, they are a way to visually represent the structure and function of ecosystems.

4. **Conclusion**:
- The aspect that is not a component of the functional unit of the ecosystem is **ecological pyramids**.

### Final Answer:
The correct answer is **D) Ecological Pyramids**.

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