Which coastal feature consists of long offshore sand deposits parallel to the coast, formed by nourishment or natural deposition?

• A. Breakwater
• B. Seawalls
• C. Barrier Islands
• D. Beach Replenishment

Answer: (C)

Think about landforms made of sand that sit just off the coast and run parallel to the shoreline. These long offshore sand deposits form a barrier between the open sea and the coast, often creating lagoons or tidal channels behind them. They arise from sediment that is carried by waves and currents and gradually accumulates in a strip parallel to the shore; this can happen through natural deposition or through nourishment efforts that add more sand to the system. This is different from breakwaters or seawalls, which are solid structures built to protect the coast rather than create offshore sandy ridges. Beach replenishment involves adding sand to the beach itself, not forming an offshore barrier. Therefore, the feature described is barrier islands.