Discussion
Consider the following statements about barrier islands.
1. Overwash during storms moves sediment to the landward side.
2. The island migrates landward as sea level rises.
3. Hard defences on the seaward face assist the natural migration.
Answer: A
The first two are correct and describe the natural behaviour. The third is the opposite of what happens, since fixing the seaward face prevents the overwash the migration depends on. Hard defence and natural migration are incompatible.
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