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← GeographyWhich mechanism determines the sinuosity of a meandering stream within a floodplain?
A)Differential erosion of stream banks✓
B)Vegetation density along the channel
C)Surface tension effects of the water
D)Magnetic field interaction with sediment
💡 Explanation
When stream flow encounters minor irregularities in the bank, differential erosion occurs because faster currents erode the outer bends more rapidly, causing the stream to migrate laterally and increase sinuosity. Therefore differential erosion results in meandering streams, rather than vegetation, surface tension, or magnetic fields, which have lesser effects.
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