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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 picture explains about the mesosphere. The mesosphere is a layer of Earth's atmosphere. It starts about 50 km (31 miles) above the ground and goes all the way up to 85 km (53 miles) high. The layer below it is called the stratosphere. The layer above it is the thermosphere.