Which Atmosphere term is correctly associated with classification or zone: “a region of enhanced ozone concentration”, and also with “located mainly in the stratosphere”?

Correct Answer: Option A — Ozone layer. Ozone layer is correct because it is a region of enhanced ozone concentration. Ozone layer is also associated with located mainly in the stratosphere. A further identifying fact is that Ozone layer is absorbs much of the Sun's harmful ultraviolet radiation. Another useful fact is that Ozone layer is associated with its depletion increases surface UV exposure. Why the other options are incorrect: Option B — Jet stream: It is a narrow band of very fast upper-level winds and is associated with generally found near the tropopause; those are the identifying facts of Jet stream. Option C — Trade winds: It is persistent tropical easterly winds and is associated with blow from subtropical highs toward the equatorial low; those are the identifying facts of Trade winds. Option D — Westerlies: It is prevailing mid-latitude winds and is associated with blow between subtropical highs and subpolar lows; those are the identifying facts of Westerlies. Exam Takeaway: Link Ozone layer with “a region of enhanced ozone concentration” and “located mainly in the stratosphere” for quick revision.