Answer:
1.Troposphere,Stratosphere,Mesosphere, Thermosphere,Exosphere,and
Ionosphere.
2.Without the atmosphere life as we know it would not be possible. The oxygen and carbon dioxide in the lower layers of the troposphere (that touches Earth) allow life to exist as organisms can respire and plants can photosynthesise. The atmosphere also helps to keep the Earth warm by trapping solar energy.
Explanation:
PA BRAINLIEST PO
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