Which outcome reduces sand supply offshore when coastal engineering disrupts sediment transport?

💡 Explanation

Sediment supply reduction leads to barrier island erosion because the **littoral drift** mechanism, crucial for replenishing them with sand, is interrupted; therefore, they erode rather than accrete, because there is insufficient material available.

• Which geological outcome is accelerated when sediment accumulates near subduction zones?
• Which outcome occurs when El Niño-Southern Oscillation weakens the Pacific Walker Circulation?
• Which process causes headwall steepening within a glacial cirque?
• Which geophysical event is most likely to occur along coastlines as permafrost thaws due to rising global temperatures?
• Which outcome results when pyroclastic flows entrain ambient air?
• Which mechanism explains downslope soil movement observed in periglacial environments experiencing thaw cycles?