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Which option correctly states the relation between river erosion and deposition?

Answer and explanation

Correct answer: Erosion is greater on steep slopes and deposition is greater on gentle slopes

The direct answer is A: erosion is greater on steep slopes, while deposition is greater on gentle slopes. A river can erode, carry, and deposit material. On a steep slope, gravity makes water flow rapidly. Fast water has more energy, so it cuts the bed and banks and carries sediment away. When the slope becomes gentle, velocity and energy usually decrease. The river then loses carrying power, and sand, silt, and pebbles settle. Option A correctly connects steep slope with stronger erosion and gentle slope with stronger deposition. Option B is wrong because gentle slopes do not produce only vertical erosion; sideways erosion and deposition can also occur. Option C is wrong because deltas form mainly where a river slows near a sea or lake, not always on steep slopes. Option D is wrong because velocity strongly affects the river’s ability to erode and transport material. Memory cue: steep and swift means cut; gentle and slow means deposit.

Related tags

ErosionDepositionSlopeRiver Work

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