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Which of the following BEST describes a dam, per the chapter?
AA barrier across flowing water that obstructs, directs or retards the flow
BA reservoir constructed at the source of a river
CAn electric turbine attached to a riverbank
DA masonry embankment built only for flood control (typical)
Answer & Solution
Correct answer: A. A barrier across flowing water that obstructs, directs or retards the flow
1. NCERT defines a dam in a sidebar within Ch 3.
2. The dam is the barrier; 'dam' often colloquially refers to the reservoir behind it.
3. Spillway/weir sections allow controlled flow.
_Source: NCERT Class 10 Geography Contemporary India - II, Ch 3 "Water Resources", §Multi-purpose Projects ¶4_
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