Final answer:
The temperature of the stratosphere changes with altitude. It remains constant in the lower portion but increases as we move higher due to the absorption of ultraviolet radiation by the ozone layer.
Step-by-step explanation:
The temperature of the stratosphere changes with altitude. In the lower portion of the stratosphere, as altitude increases, the temperature remains relatively constant, which is known as the stratopause. However, as we move higher into the stratosphere, the temperature starts to increase due to the absorption of ultraviolet radiation by the ozone layer. This region is called the mesosphere. So, the correct answer is D. The temperature increases.
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