Which country is world's largest hydroelectricity producer?

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks which country is the largest producer of hydroelectricity in the world.

2. **Identify the Options**: The options provided are:
- A) India
- B) Brazil
- C) USA
- D) China

3. **Define Hydroelectricity**: Recognize that hydroelectricity is generated by harnessing the energy of flowing water, typically through dams that drive turbines to convert potential energy into mechanical energy.

4. **Research the Producers**: Know the significance of hydroelectric power as a renewable energy source and identify the countries known for their hydroelectric production.

5. **Determine the Largest Producer**: Based on available data and statistics, it is established that China is the largest producer of hydroelectricity in the world.

6. **Conclude the Answer**: Therefore, the correct answer to the question is D) China.

---