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The swash zone is

  • A.the region seaward of the breaker line
  • B.the flat area behind the beach crest
  • C.the permanently submerged bar lying offshore of the surf zone
  • D.the part of the beach alternately covered by uprush and backwash

Answer: D

It is the most energetic part of the profile per unit area and changes shape rapidly. Its slope adjusts quickly to the prevailing wave conditions and sediment size. It is the most rapidly changing part of the whole profile.

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