Which of these actions can be harmful to a person during a thunderstorm?

Options

A. Staying away from tall trees
B. Staying away from water bodies
C. Installing lightning conductors on tall structures
D. Using electronic appliances such as mobile phones

Answer

### Step-by-Step Text Solution:

1. **Identify the Actions**: We need to analyze various actions that can be taken during a thunderstorm to determine which ones can be harmful.

2. **Staying Away from Tall Trees**: It is advisable to stay away from tall trees during a thunderstorm. Lightning often strikes tall objects, and being near a tall tree can increase the risk of being struck.

3. **Using Electronic Appliances**: Using electronic appliances, such as mobile phones, during a thunderstorm can also be harmful. If these devices are connected to an electrical outlet, they can conduct electricity if lightning strikes the power lines.

4. **Conclusion**: The harmful actions during a thunderstorm include staying near tall trees and using electronic appliances that are plugged into an electrical outlet.