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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.
Troposphere, stratosphere, mesosphere, thermosphere and exosphere. Troposphere is the Lowermost layer of the atmosphere and it contains half of the earth's atmosphere. It begins at the surface of the earth and extends out to about 4-12 miles. Air we breathe is present in this layer.