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In the atmosphere, the absorption and scattering of solar ultraviolet radiation primarily occur in the stratosphere. The stratosphere is the layer of the atmosphere located above the troposphere and below the mesosphere. It extends from about 10 to 50 kilometers above the Earth`s surface. This layer contains a high concentration of ozone (O3) molecules, which absorb a significant amount of solar ultraviolet radiation. Ozone acts as a protective layer, preventing much of the harmful UV radiation from reaching the Earth`s surface. This absorption and scattering process in the stratosphere helps regulate the climate and protect living organisms from the harmful effects of excessive UV radiation. Therefore, the correct answer is option 2: Stratosphere.