Coasts Crossword

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Across
  1. 1. movement of water down a beach towards the sea
  2. 4. the act of protecting our coastlines
  3. 6. the spiky bit left from hard, not eroded beach
  4. 7. less resistant, erodes easily
Down
  1. 2. water that rushes up to the beach after wave breaks
  2. 3. more resistant, erodes with difficulty
  3. 5. a soft rock that's eroded easily and creates a beach