The lower most layer of atmosphere in which man and other living organisms exist, is called as
A
Mesosphere
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B
Stratosphere
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C
Trophosphere
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D
Thermosphere
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Solution
The correct option is D Trophosphere The troposphere is the lowest layer of Earth's atmosphere and site of all weather on Earth. The troposphere is bonded on the top by a layer of air called as the tropopause, which separates the troposphere from the stratosphere, and on bottom by the surface of the Earth. It contains approximately 75% of the atmosphere's mass and 99% of its water vapour and aerosols. The average depth of the troposphere is approximately 17 km in the middle latitudes.