*Question E3A08:
When a meteor strikes the Earth’s atmosphere, a linear ionized region is formed at what region of the ionosphere?*  

*Correct Answer is  A: The E region*  

### AI Response: (may contain errors)  

When a meteor strikes the Earth’s atmosphere, it creates a linear ionized region primarily in the E region of the ionosphere. Here's a breakdown of why this is the correct answer and why the other options are incorrect:

### Correct Answer: The E region
- **Formation of the E region**: The E region, located approximately 90 to 150 km above the Earth's surface, is where ionization occurs due to solar radiation and other energetic events, such as meteors entering the atmosphere. When a meteor strikes, it heats the surrounding air, causing ionization and forming a linear trail of ionized particles.
- **Propagation effects**: This ionized region can reflect radio waves, making it useful for certain types of radio communication, especially at HF frequencies.

### Why the Other Choices are Incorrect:
- **B: The F1 region**: 
  - The F1 region is located above the E region, typically between 150 km and 200 km. It is primarily influenced by solar activity and is not the first region to be ionized by meteors.
  
- **C: The F2 region**: 
  - The F2 region is the highest part of the ionosphere, extending from about 200 km to 1,000 km. It is also influenced by solar radiation but is not directly formed by meteor impacts. The F2 region is more stable and is responsible for long-distance radio propagation.

- **D: The D region**: 
  - The D region is located below the E region, approximately 30 to 90 km above the Earth. It is primarily ionized by solar radiation during the day and is not typically associated with meteoric activity. The D region absorbs radio waves, making it less useful for communication.

### Summary
- The E region is the correct answer because it is the primary area where meteors create ionization upon entering the atmosphere.
- The F1 and F2 regions are higher and not directly affected by meteors, while the D region is lower and absorbs radio waves.

This understanding of the ionosphere's structure and the effects of meteors is crucial for the Extra Class exam and for practical radio communication.