Which Atmosphere term is correctly associated with weather or climate role: “it is relatively stable and has little vertical mixing”, and also with “the layer above the troposphere”?

Correct Answer: Option D — Stratosphere. Stratosphere is correct because it is it is relatively stable and has little vertical mixing. Stratosphere is also associated with the layer above the troposphere. A further identifying fact is that Stratosphere is temperature rises with height because ozone absorbs ultraviolet radiation. Another useful fact is that Stratosphere is associated with it is relatively stable and has little vertical mixing. Why the other options are incorrect: Option A — Mesosphere: It is many meteors burn up in it and is associated with the layer above the stratosphere; those are the identifying facts of Mesosphere. Option B — Thermosphere: It is auroras occur mainly in this region and is associated with a very thin upper atmospheric layer; those are the identifying facts of Thermosphere. Option C — Exosphere: It is light gases such as hydrogen and helium dominate and is associated with the outermost atmospheric region; those are the identifying facts of Exosphere. Exam Takeaway: Link Stratosphere with “it is relatively stable and has little vertical mixing” and “the layer above the troposphere” for quick revision.