Sewage water can be purified for recycling with action of :

Options

A. Aquatic plant
B. Micro organism
C. Penicillin
D. Fishes

Answer

### Step-by-Step Solution:

1. **Understanding Sewage Water**:
- Sewage water is wastewater that contains a mixture of water and various impurities, including organic substances, pathogens, and chemicals.

2. **Identifying Purification Methods**:
- The question asks how sewage water can be purified for recycling. Various methods can be employed, but we need to identify the most effective one from the given options.

3. **Evaluating the Options**:
- **Option A: Aquatic Plants**:
- Aquatic plants require oxygen to survive. Sewage water typically has low oxygen levels, making it unsuitable for aquatic plants to thrive or purify the water. Therefore, this option is incorrect.

- **Option B: Fishes**:
- Similar to aquatic plants, fishes also need oxygen to live. The low oxygen levels in sewage water prevent fishes from surviving, making this option incorrect as well.

- **Option C: Penicillin**:
- Penicillin is an antibiotic used to treat bacterial infections in humans, not for purifying sewage water. Thus, this option is also incorrect.

- **Option D: Microorganisms**:
- Microorganisms, including bacteria, play a crucial role in breaking down organic matter in sewage water. There are two types of microorganisms involved:
- **Aerobic microorganisms**: These require oxygen to decompose organic substances.
- **Anaerobic microorganisms**: These do not require oxygen and can break down organic materials in low-oxygen environments.
- Therefore, microorganisms are the correct choice for purifying sewage water.

4. **Conclusion**:
- The correct answer to the question is that sewage water can be purified for recycling with the action of **microorganisms**.