Why Would Sand Be Deposited Behind a Small Island to Form

question 69

Multiple Choice

Why would sand be deposited behind a small island to form a spit or tombolo?

• A) The onshore current from one direction piles up sand here.
• B) Waves refract around the island and the wave energy is dissipated on the island, allowing quiescent water behind, and sand drift to accumulate behind the island.
• C) The island protects the coast from rip currents, preserving the sand.
• D) The tidal affects are trivial behind the island, so the sand is not swept away.

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