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← GeographyWhich outcome is most likely when human barrier island development greatly impedes sediment transport?
A)Increased longshore drift erosion rates✓
B)Enhanced barrier island buffer capacity
C)Reversal of isostatic sea rebound
D)Decreased offshore bar sediment supply
💡 Explanation
When barrier island sediments are blocked by human modifications updrift, erosion rates downstream increase because sediment starvation occurs; the natural mechanism of longshore drift moves less material. Therefore, erosion escalates rather than buffering, sea rebound remains unchanged, and offshore sediment is less connected.
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