which of the following factor inhibit decomposition?

Options

A. low temperature and anaerobiosis
B. warm and moist environment
C. aeration
D. both (2) & (3)

Answer

To determine which factors inhibit decomposition, we need to analyze the options provided and understand how each factor affects the decomposition process.

### Step-by-Step Solution:

1. **Understanding Decomposition**:
- Decomposition is the process by which organic substances are broken down into simpler organic or inorganic matter. It is essential for nutrient cycling in ecosystems.

2. **Identifying Factors**:
- The question lists several factors that could potentially affect decomposition:
- Low temperature and anaerobiosis
- Warm and moist environment
- Aeration
- Both 2 and 3

3. **Analyzing Each Factor**:
- **Low Temperature**:
- Decomposition is generally slower at low temperatures because the metabolic rates of decomposers (like bacteria and fungi) decrease. Therefore, low temperatures inhibit decomposition.

- **Anaerobiosis**:
- Anaerobic conditions (lack of oxygen) significantly inhibit decomposition. Many decomposers require oxygen to break down organic matter, so when oxygen is limited, decomposition slows down or stops.

- **Warm and Moist Environment**:
- A warm and moist environment is conducive to decomposition. Higher temperatures and moisture levels generally promote the activity of decomposers, thus facilitating decomposition.

- **Aeration**:
- Aeration involves the presence of oxygen, which is necessary for aerobic decomposition. Adequate aeration promotes decomposition rather than inhibits it.

4. **Conclusion**:
- Based on the analysis, the factors that inhibit decomposition are **low temperature** and **anaerobiosis**. Therefore, the correct answer is **both low temperature and anaerobiosis**.

### Final Answer:
The factors that inhibit decomposition are **low temperature and anaerobiosis**.

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