Correct option is D
Introduction
South of the Himalayas, the vast northern plains are divided into several distinct belts. The sequence from north to south, starting right at the foothills of the Shivaliks (the outermost range of the Himalayas), is
Bhabar, followed by Tarai, Bhangar, and then Khadar. The
Bhabar belt is the narrowest and is characterized by a stretch of gravel and pebbles deposited by streams descending from the mountains, which is why it is the
northernmost.
Information Booster
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Location: It lies immediately adjacent to the foothills of the Shiwalik range (Outer Himalayas).
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Composition: Characterized by deposits of pebbles and rocks, in a narrow belt of about 8 to 16 km wide.
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Percolation: Streams and rivers often disappear in this zone due to the high porosity of the gravel deposits.
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Suitability for Agriculture: The soil is generally not suitable for cultivation.
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Northernmost Position: It marks the transition zone from the steep slopes of the mountains to the plains.
Additional Points
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Khadar: The youngest alluvial plain, or new alluvium, formed by fresh deposits of silt every year during the flood season, found closest to the riverbeds, and hence, further south.
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Bhangar: The older alluvial plain, which is higher up and away from the riverbeds, consisting of older alluvium, located south of the Tarai belt.
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Tarai: Lies south of the Bhabar belt and is a 15-30 km wide marshy, forested region where the streams that disappeared in the Bhabar re-emerge.