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← GeographyWhich risk elevates erosion behind barrier islands after storms?
A)Overwash strengthens tidal channel migration✓
B)Erosion exceeds sediment replacement rates
C)Vegetation stabilizes dune system growth
D)Accretion builds nearshore sediment deposits
💡 Explanation
Overwash transports sand across barrier islands, forming inlets and tidal channels; this results in intensified currents behind the island to erode those backshore areas because it increases tidal prism rather than reduces it, therefore tidal channel migration strengthens, rather than weakens stabilizing influences post-storm.
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