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Geography

While travelling through the Himalayas you can observe that thick vegetation is found in one slope but vegetation is very light in other slope.

What can be the reason for such fact in Himalaya?

Insolation

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Answer

This difference in vegetation is due to the variation in sunlight and rainfall received by the slopes. The south-facing slope of the Himalayas receives direct sunlight for longer periods and gets abundant rainfall, creating favorable conditions for dense vegetation. In contrast, the north-facing slope lies in the rain shadow region, receives less sunlight at a lower angle, and gets limited rainfall. As a result, vegetation is much sparser on the north-facing slope.

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