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): An elevated geographic feature, such as a ridge, mountain range, or upland, that separates two adjacent drainage basins or river systems. Rain falling on opposite sides of a water divide flows into different river networks or ultimate water bodies (e.g., the Western Ghats form a major water divide in India, separating rivers flowing into the Arabian Sea from those flowing into the Bay of Bengal).
Overview of Other Options
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b) Rift Valley: A linear lowland or trough formed by tectonic subsidence where Earth’s crust pulls apart (such as the valleys of the Narmada and Tapti rivers).
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c) Delta: A triangular or fan-shaped alluvial landform created by sediment deposition at a river’s mouth.
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d) Flood Plain: A flat, fertile area bordering a river channel formed by the deposition of silt during periodic floods.
