Lightning is a common example of ………

Explanation

### Step-by-Step Solution:

1. **Understanding Lightning**:
- Lightning is a natural phenomenon that occurs during thunderstorms. It is characterized by a bright flash of light caused by the discharge of electricity.

2. **Identifying the Cause**:
- The primary cause of lightning is the buildup of electrical charges in clouds. This occurs due to various processes, including the collision of ice particles within the clouds, which leads to the separation of charges.

3. **Electric Discharge**:
- When the electrical potential difference between the charged clouds and the ground becomes too great, it results in an electric discharge. This discharge is what we observe as lightning.

4. **Conclusion**:
- Therefore, lightning can be classified as an example of an electrical discharge. Specifically, it is a common example of an electric discharge in the air.

### Final Answer:
Lightning is a common example of **electrical discharge**.

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