Consider the following pairs: Layers of Atmosphere : Characteristics I. Troposphere : Absorbs ultraviolet radiation II. Stratosphere : Changes in weather and climate III. Mesosphere : Reflects radio waves back to the Earth How many of the pairs given above are correctly matched?

None of the pairs is correctly matched. The Troposphere is the layer where weather changes and climate phenomena occur (not UV absorption). The Stratosphere contains the ozone layer which absorbs ultraviolet radiation (not weather changes). Radio waves are reflected back by the Ionosphere (within the Thermosphere), not the Mesosphere. Therefore, all three pairings are incorrect.