Which Greenhouse Effect and Global Warming term is correctly associated with type or identity: “a secondary air pollutant and greenhouse gas”, and also with “formed by sunlight-driven reactions involving precursor pollutants”?

Correct Answer: Option A — Tropospheric ozone. Tropospheric ozone is correct because it is a secondary air pollutant and greenhouse gas. Tropospheric ozone is also associated with formed by sunlight-driven reactions involving precursor pollutants. A further identifying fact is that Tropospheric ozone is contributes to warming near Earth's surface. Another useful fact is that Tropospheric ozone is associated with it should not be confused with protective stratospheric ozone. Why the other options are incorrect: Option B — Greenhouse effect: It is a natural atmospheric warming process and is associated with occurs when gases absorb and re-emit outgoing infrared radiation. Option C — Global warming: It is a long-term rise in Earth's average surface temperature and is associated with driven currently mainly by human greenhouse-gas emissions. Option D — Carbon sink: It is a reservoir that absorbs more carbon than it releases and is associated with forests, soils and oceans can function as sinks. Exam Takeaway: Link Tropospheric ozone with “a secondary air pollutant and greenhouse gas” and “formed by sunlight-driven reactions involving precursor pollutants” for quick revision.