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Assertion (A): Coastal structures often produce consequences their designers did not anticipate.
Reason (R): Morphology responds to the structure and the changed morphology alters the wave field.

  • A.Both A and R are true, and R is the correct explanation of A
  • B.Both A and R are true, but R is not the correct explanation of A
  • C.A is true but R is false
  • D.A is false but R is true

Answer: A

Both are true and the reason gives the feedback, and downdrift erosion beside a groyne field is the classic example. Predicting the response requires a morphodynamic rather than a static analysis. Feedback is what makes prediction difficult.

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