Write down the activities which may be polluting the water source.

Explanation

### Step-by-Step Solution:

1. **Discharge of Sewage**: One of the primary activities that pollute water sources is the discharge of sewage or wastewater. This includes domestic waste that is released into rivers, lakes, and other water bodies, leading to contamination.

2. **Dumping of Waste**: Another significant activity is the dumping of various types of waste, including solid waste from households and villages. This waste often ends up in water bodies, degrading water quality.

3. **Factory Waste Disposal**: Factories often produce waste that can be hazardous. When this waste is improperly disposed of, such as being dumped into rivers, it contributes to severe water pollution.

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