What is the boundary separating two drainage basins called?
a) Water Divide
b) Rift Valley
c) Delta
d) Flood Plain
Answer: a) Water Divide
Explanation
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Water Divide (Waterparting or Watershed): An elevated area, such as a mountain range, upland, or ridge, that separates two adjacent drainage basins or river systems. Precipitation falling on opposite sides of a water divide flows into different river networks or oceans (e.g., the Western Ghats serve as a major water divide in Peninsular India, separating east-flowing rivers that drain into the Bay of Bengal from west-flowing rivers that empty into the Arabian Sea).
Overview of Other Options
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b) Rift Valley: A lowland region formed where Earth’s tectonic plates pull apart (e.g., the valley floors through which the Narmada and Tapti rivers flow).
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c) Delta: A landform created by sediment deposition at the mouth of a river where it enters a standing body of water.
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d) Flood Plain: A flat, low-lying area adjacent to a river channel built up by repeated seasonal flooding and alluvial sediment deposition.
