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Assertion (A): Barrier islands migrate landward over long periods.
Reason (R): Storm overwash transfers sediment from the seaward face to the landward side.

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

Answer: D

Both are true and the reason gives the mechanism, and sea level rise accelerates the process. Fixing the island in place by hard defences interrupts the supply that sustains it. Overwash is the mechanism that keeps the island alive.

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