Which of the following constitutes of a micro -ecosystem ?

Options

A. Ocean
B. Pond
C. Log of wood
D. Kitchen garden

Answer

To determine which of the following constitutes a micro-ecosystem, we need to understand what a micro-ecosystem is. A micro-ecosystem is a small ecosystem where a limited number of organisms interact and depend on each other for survival.

### Step-by-Step Solution:

1. **Definition of Micro-Ecosystem**:
- A micro-ecosystem is characterized by a small area with a limited number of organisms that interact with each other.

2. **Options Analysis**:
- **Ocean**: This is a vast aquatic ecosystem with a diverse range of organisms. It cannot be classified as a micro-ecosystem due to its large size and complexity.
- **Pond**: A pond is a smaller freshwater ecosystem that contains a countable number of organisms. It is often referred to as a small community where various organisms depend on each other, making it a suitable example of a micro-ecosystem.
- **Log of Wood**: A log can host a variety of microorganisms, bacteria, and fungi, creating a small ecosystem. It can be considered a micro-ecosystem due to the interactions among these organisms.
- **Kitchen Garden**: While a kitchen garden has plants and may have some interactions among organisms, it is typically managed by humans and may include a variety of species that do not necessarily depend on each other in a natural ecosystem context.

3. **Conclusion**:
- Among the options, both the **pond** and the **log of wood** can be considered micro-ecosystems. However, the pond is more commonly recognized as a classic example of a micro-ecosystem due to its defined boundaries and community interactions.

### Final Answer:
- The correct answer is **Pond**.