The area drained by a river and its tributaries is known as a .
A
water divide
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B
drainage basin
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C
river system
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D
lagoon
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Solution
The correct option is B drainage basin The area drained by a single river system is called a drainage basin. An elevated land that separates two drainage basins is called a water divide. The main river along with its tributaries forms a river system. Lagoons are shallow water bodies separated from larger ones by coral reefs or barrier islands.