Natural decomposition of dead remains of animal is carried out by

Options

A. Bacteria
B. Fungi
C. Viruses
D. All separately

Answer

### Step-by-Step Solution:

1. **Understanding Decomposition**:
- Decomposition is the process through which dead organic matter is broken down into simpler organic and inorganic substances. This process is essential for nutrient recycling in ecosystems.

2. **Identifying Decomposers**:
- Decomposers are organisms that play a crucial role in breaking down dead organic material. They convert complex organic substances into simpler forms, such as carbon dioxide, water, and minerals.

3. **Evaluating the Options**:
- **Option A: Bacteria**:
- Bacteria are known as primary decomposers. They break down dead remains of animals and plants, facilitating the decomposition process.
- **Option B: Fungi**:
- Fungi also contribute to decomposition but are not the primary agents for the decomposition of animal remains.
- **Option C: Viruses**:
- Viruses are not decomposers; they are infectious agents that replicate inside living cells and do not play a role in the decomposition of dead matter.
- **Option D: All of the above**:
- This option is incorrect as not all the listed organisms are responsible for decomposition.

4. **Conclusion**:
- Based on the evaluation, the correct answer is **Option A: Bacteria**, as they are the primary organisms responsible for the natural decomposition of dead remains of animals.