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प्रश्न
How is waterfall formed?
आकृती
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उत्तर
A waterfall is formed when there is a sudden drop in the river valley. It is like a cliff where the drop is almost perpendicular. Waterfalls are formed in the upper regions of river valleys. When contours on a map are very close to one another or sometimes touch each other as they cross a river or stream, it indicates the presence of a waterfall.
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