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← GeographyWhich outcome occurs when a levee breach accelerates?
A)Avulsion forms new alluvial fans✓
B)Delta subsidence reverses sedimentation
C)Drainage divides extend lake basins
D)Erosion grades new coastal cliffs
💡 Explanation
Avulsion occurs due to levee breach exceeding the critical threshold because rapid sedimentation favors newer, steeper flow paths; therefore alluvial fans rapidly change, rather than coastal cliffs eroding progressively, delta subsidence inverting, or drainage extension.
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