Answer: Option D
Step-by-step explanation:
The stratosphere is the region in which the temperature is highest. This is because the ozone layer is found in the stratosphere which has the ability to catch the solar radiations.
The radiations captured in this layer helps in heating the stratosphere. The only source of heat is the sun which helps in heating the environment.
This is the reason the stratosphere has heat. It is the second highest layer after mesosphere.