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The tropopause is defined as:

  1. A
    A transitional boundary layer between the troposphere and the stratosphere.
  2. B
    A natural umbrella above volcanic eruptions.
  3. C
    Both (A) and (B)
  4. D
    Neither (A) nor (B)

Solution & Step-by-step Explanation

In atmospheric sciences, the tropopause is the thermodynamic boundary layer separating the lower troposphere from the upper stratosphere. In this boundary layer, the environmental lapse rate drops significantly, halting further convective temperature declines.

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The tropopause is defined as:
A
A transitional boundary layer between the troposphere and the stratosphere.
B
A natural umbrella above volcanic eruptions.
C
Both (A) and (B)
D
Neither (A) nor (B)

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