Question

Assertion (A) In mountainous regions a variety of natural vegetation is found.

Reason (R) Temperature decreases with increase in altitude.​

Answer 1

Answer:

(a) In mountainous areas, the decrease in temperature with increasing altitude leads to the corresponding change in natural vegetation. As such, there is a succession of natural vegetation belts in the same order as we see from the tropical to the tundra region.

(b) As you increase in elevation, there is less air above you thus the pressure decreases. As the pressure decreases, air molecules spread out further (i.e. air expands) and the temperature decreases. If the humidity is at 100 percent (because it's snowing), the temperature decreases more slowly with height.

Answer 2

Answer:

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