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Coastal dunes contribute to shore protection by

  • A.preventing longshore drift entirely
  • B.storing sand that is released to the beach during storms
  • C.reflecting the incident wave energy straight back out to sea
  • D.raising the tidal range at the site

Answer: B

The dune acts as a reservoir eroded during a storm and rebuilt by wind afterwards. Vegetation is essential to trapping the sand that rebuilds it. The dune is a reservoir rather than a barrier. Wind rebuilds what the storm removed from it.

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