The layer of atmosphere in which air masses move and interact is known as the Troposphere.
- This is because Troposphere is considered to be the lowest part of the atmosphere and many of the climatic conditions begin here.
- For example, climatic conditions such as convection, turbulence, water vapor, and clouds are formed in the troposphere.
- The troposphere also comprises the oxygen we breathe and help maintain our planet more livable.
Hence, in this case, the correct answer is option D "troposphere."
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