The slow rate of decomposition of fallen logs in nature is due to their

Options

A. Anaerobic environment around them
B. Low cellulose content
C. Low moisture content
D. Poor nitrogen content

Answer

### Step-by-Step Solution:

1. **Understanding Decomposition**: Decomposition is the process where dead organic matter is broken down into inorganic substances by microorganisms. This process is crucial for nutrient cycling in ecosystems.

2. **Identifying the Subject**: The question focuses on fallen logs, which are essentially trees or parts of trees that have naturally fallen in a forest. These logs play an important role in the ecosystem by providing food and shelter for various organisms.

3. **Factors Affecting Decomposition**: The decomposition rate of fallen logs can be influenced by several factors, including:
- The presence of oxygen (aerobic vs. anaerobic conditions).
- The cellulose content of the logs.
- The moisture content in the environment.
- The nitrogen content available for microbial activity.

4. **Analyzing the Options**:
- **Anaerobic Environment**: This is not a factor for fallen logs in forests, as there is ample oxygen present.
- **Low Cellulose Content**: A low cellulose content would actually lead to faster decomposition, not slower.
- **Low Moisture Content**: Microorganisms require moisture to thrive and carry out decomposition. If moisture is low, decomposition slows down significantly.
- **Poor Nitrogen Content**: While nitrogen is important for microbial activity, the lack of moisture is a more critical factor for the decomposition rate.

5. **Conclusion**: The slow rate of decomposition of fallen logs in nature is primarily due to low moisture content. Microorganisms need sufficient water to effectively decompose organic matter, and without it, the process slows down considerably.

### Final Answer:
The slow rate of decomposition of fallen logs in nature is due to their **low moisture content**.

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