A water body has high BOD indicating that water is

Options

A. Being contaminated with sewage
B. Being aerated
C. Receiving minerals
D. Atrophic.

Answer

### Step-by-Step Solution:

1. **Understanding BOD**:
- BOD stands for Biological Oxygen Demand. It measures the amount of oxygen that microorganisms will consume while decomposing organic matter in water.

2. **Interpreting High BOD**:
- A high BOD value indicates a high level of organic matter present in the water. This can be due to the presence of sewage or other organic pollutants.

3. **Impact on Oxygen Levels**:
- When organic matter is abundant, bacteria and other microorganisms break it down, consuming dissolved oxygen in the process. This leads to a reduction in the amount of oxygen available in the water.

4. **Consequences of Low Oxygen**:
- A decrease in dissolved oxygen can create a hostile environment for aquatic life, potentially leading to the death of fish and other organisms that rely on oxygen.

5. **Analyzing the Options**:
- **Option A: Being contaminated with sewage** - This is likely the correct answer as sewage contains high levels of organic matter, leading to increased BOD.
- **Option B: Being aerated** - This would typically lower BOD, not increase it.
- **Option C: Receiving minerals** - This does not directly relate to BOD levels.
- **Option D: Trophic** - This term relates to the feeding relationships in ecosystems and does not specifically indicate BOD levels.

6. **Conclusion**:
- Given the above analysis, the correct answer is that a water body with high BOD is "being contaminated with sewage."