Who established that the spark produced by Amber and those in sky during thunderstorms were similar?

Options

A. David Ryner
B. Benjamin Franklin
C. Charles F. Richter
D. William Richard

Answer

To answer the question "Who established that the spark produced by Amber and those in the sky during thunderstorms were similar?", we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Question**: We need to find out who made the observation that sparks from amber and lightning during thunderstorms are similar.

2. **Consider the Options**: The options provided are:
- David Reiner
- Benjamin Franklin
- Charles F. Richter
- William Richard

3. **Historical Context**: We need to think about historical figures known for their work related to electricity and thunderstorms.

4. **Research on Benjamin Franklin**: Benjamin Franklin, an American scientist, is well-known for his experiments with electricity. In 1752, he conducted his famous kite experiment, which demonstrated that lightning is a form of electricity.

5. **Conclusion**: Based on historical records, it was Benjamin Franklin who established that the sparks produced by amber (static electricity) and those in the sky during thunderstorms (lightning) are similar.

6. **Final Answer**: Therefore, the correct answer is **Benjamin Franklin** (Option 2).