A pond contains clean water. Which of the following activities will produce least pollution of water?

Options

A. washing clothes in the pond
B. animals bathing in the pond
C. washing motor vehicles in the pond
D. swimming in the pond.

Explanation

To determine which activity will produce the least pollution in a pond containing clean water, let's analyze the given options step by step:

### Step 1: Analyze the first option - Washing clothes in the pond
- **Explanation**: When clothes are washed in the pond, detergents and dirt from the clothes are released into the water. This leads to pollution.
- **Conclusion**: This option produces significant pollution.

### Step 2: Analyze the second option - Animal bathing
- **Explanation**: Bathing animals in the pond often involves using soap or other cleaning agents, which can also introduce dirt and chemicals into the water.
- **Conclusion**: This option also produces significant pollution.

### Step 3: Analyze the third option - Washing motor vehicles in the pond
- **Explanation**: Washing vehicles typically involves the use of detergents and can release oil, dirt, and other pollutants into the pond.
- **Conclusion**: This option produces significant pollution as well.

### Step 4: Analyze the fourth option - Swimming in the pond
- **Explanation**: Swimming does not involve the introduction of detergents or other pollutants. While it may introduce some organic matter (like skin cells), it is minimal compared to the other activities.
- **Conclusion**: This option produces the least pollution.

### Final Answer
Based on the analysis, the activity that will produce the least pollution of water in the pond is **swimming in the pond**.

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