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 risk increases when transverse dune migration accelerates?
• Which sand dune migration outcome arises because vegetation anchoring fails?
• Which mechanism causes reversing transverse dune crest migration?
• Which mechanism increases ground displacement during an earthquake in areas with soft alluvial sediments?
• Which mechanism influences jet stream meandering as it passes over major mountain ranges and coastal streams?
• Which airflow results from an idealized, non-rotating Earth experiencing greater equatorial heating?