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A. Troposphere B. Stratosphere C. Mesosphere D. Thermosphere. A: Troposphere is the atmospheric layer closest to the Earth's surface. Log in to see link for more information. Question|Asked by janiya. Asked 314 days ago|6/9/2016 2:02:09 PM. Updated 314 days ago|6/10/2016 2:53:26 AM.
This is the lowest layer of the atmosphere, closest to the surface of the earth. The troposphere varies in height in different parts of the world, from about 8km above sea level at the poles, to 16km at the equator. This is the layer where we see clouds and most of the weather occurs.