The correct answer would be option A, Layer A is the thermosphere and Layer B is the exosphere.
Dan Described two layers of Earth's Atmosphere. Layer A is the thermosphere and Layer B is the exosphere.
Explanation:
There are five main layers in the atmosphere. These are as follows:
Thermosphere is the layer in the atmosphere which allows long distance radio communication, and Exosphere is the layer in the atmosphere which separates the outer space from the Earth's atmosphere.
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