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← GeographyWhich phenomenon limits the meandering of steam within floodplains?
A)Terrace formation by isostatic rebound
B)Lateral migration exceeding incision rate
C)Avulsion from floodplain topographic steering✓
D)Entrenchment caused by base-level fall
💡 Explanation
Streams avulse due to topographic steering from uneven sediment deposition along a floodplain that raises the elevation; therefore the stream changes its primary channel, rather than lateral migration, because the higher floodplain areas redirect water flow.
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