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If a river mouth is wide and tidal influence is high, which coastal form should it be linked with?

Answer and explanation

Correct answer: Estuary

The direct answer is option C, estuary. An estuary is the broad, partly funnel-shaped mouth of a river where freshwater mixes with seawater and tidal action is strong. Tides can carry water into and out of the river mouth, and strong tidal movement may prevent large amounts of sediment from building a triangular delta. Option C is correct because a wide mouth and strong tidal influence are characteristic clues of an estuary. Option A, a delta, usually forms when a river deposits much sediment at its mouth and divides into distributaries; it is not the best match for the stated tidal clue. Option B, a coral atoll, is a ring-shaped coral island around a lagoon and is unrelated to a river mouth. Option D, a glacial lake, is formed by ice-related processes, usually in mountainous or formerly glaciated areas, not at a tidal sea mouth. Narmada and Tapi are standard Indian examples associated with estuarine mouths. Exam cue: wide tidal river mouth means estuary; sediment-built triangular mouth means delta.

Related tags

EstuaryRiver MouthTides

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