Select the non-point source of water pollution from the following:

Options

A. Run off water
B. Industries
C. Thermal plant
D. Power plant

Explanation

**Step-by-Step Solution:**

1. **Understand the Types of Water Pollution Sources:**
- Water pollution sources are categorized into two types: point sources and non-point sources.
- Point sources have a specific location from which pollutants are discharged, such as a pipe from a factory.
- Non-point sources are scattered and do not have a specific discharge point. They can come from various sources over a wide area.

2. **Identify the Given Options:**
- The options provided are: runoff water, industries, thermal plant, and power plant.

3. **Analyze Each Option:**
- **Runoff Water:** This is water that flows over the ground surface and can carry pollutants from various sources like fields, lawns, and gardens. It does not come from a single identifiable source, making it a non-point source of pollution.
- **Industries:** These are point sources as they discharge pollutants from a specific location (e.g., a factory).
- **Thermal Plant:** This is also a point source as it releases pollutants from a specific facility.
- **Power Plant:** Similar to thermal plants, power plants are point sources because they discharge pollutants from a defined location.

4. **Select the Correct Answer:**
- Among the options, **runoff water** is the only non-point source of water pollution.

5. **Conclusion:**
- Therefore, the correct answer to the question is **runoff water**.