Select the method used for water purification.

Options

A. Water filter
B. Boiling
C. Chlorination
D. All of the above

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks for methods used for water purification. Water purification is essential for making water safe for drinking.

2. **Identify the Methods**: There are several methods commonly used for water purification. The options provided include:
- Water filter
- Boiling
- Chlorination
- All of the above

3. **Evaluate Each Method**:
- **Water Filter**: This method involves using a physical barrier to remove impurities and contaminants from water. It is effective in purifying water.
- **Boiling**: Boiling water kills harmful microorganisms, making it safe for drinking. This method is widely used and effective.
- **Chlorination**: This method involves adding chlorine to water, which disinfects it by killing bacteria and other pathogens. It is a common practice in municipal water treatment.

4. **Conclusion**: Since all the mentioned methods (water filter, boiling, and chlorination) are effective for purifying water, the correct answer is "All of the above."

5. **Final Answer**: Therefore, the method used for water purification is **All of the above**.

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