The correct answer is C. Ionosphere.
The ionosphere is a region of Earth’s upper atmosphere that is ionized by solar radiation. It extends from about 60 to 1,000 kilometers above the Earth’s surface. The ionosphere is important for radio communication because it reflects radio waves back to Earth. This allows radio signals to
travel over long distances.The stratosphere is the layer of Earth’s atmosphere that extends from the troposphere to the mesosphere. It is located between about 10 and 50 kilometers above the Earth’s surface. The stratosphere is characterized by a decrease in temperature with increasing altitude. This is due to the absorption of ultraviolet radiation by
ozone molecules.The ozone layer is a region of Earth’s stratosphere that contains high concentrations of ozone (O3). The ozone layer absorbs most of the Sun’s ultraviolet radiation, which helps to protect life on Earth from harmful effects.
The troposphere is the lowest layer of Earth’s atmosphere. It extends from the surface of the Earth to about 12 kilometers above the Earth’s surface. The troposphere is characterized by a decrease in temperature with increasing altitude. This is due to the absorption of solar radiation by the Earth’s surface.