Which one of the following layers of the atmosphere is responsible for the deflection of radio waves?

1. The question asks which layer of the atmosphere is responsible for the deflection of radio waves. 2. The Ionosphere is a region of the Earth's upper atmosphere (overlapping parts of the Mesosphere and extending into the Thermosphere) that is ionized by solar radiation. 3. This ionization creates layers of free electrons and ions that can reflect or refract (bend) radio waves, particularly those in the shortwave frequency band. 4. This property allows for long-distance radio communication, as waves can be bounced off the Ionosphere back to Earth. 5. The Troposphere (weather layer), Stratosphere (ozone layer), and Mesosphere (where meteors burn up) do not possess this characteristic ability to deflect radio waves for long-distance propagation.