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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.
The troposphere is the atmospheric layer closest to the earth. It is often. referred to as the âlower atmosphere.â This layer holds the most dense composition. of gases and molecules. Almost all of our weather is created within the troposphere. The stratosphere is just above the troposphere, starting at an average altitude. of about 7 miles above sea level.