What offshore structure is placed to reduce the energy of incoming waves before they reach the shore?

• A. Beach Replenishment
• B. Bulkheads
• C. Seawalls
• D. Breakwater

Answer: (D)

The key idea is using an offshore barrier to calm waves before they reach the shore. A breakwater is placed offshore and works by interrupting and dissipating wave energy as waves interact with the structure, causing waves to break and lose power in the lee of the breakwater. This creates a sheltered area behind it with calmer water, which helps protect harbors, reduce erosion, and lessen wave impact on the coast.

Other options don’t fit this function as specifically. Beach replenishment adds more sand to the shoreline to widen the beach rather than reducing wave energy offshore. Bulkheads are vertical walls built along the shore to guard land directly, without diminishing offshore wave energy. Seawalls run along the coastline and absorb or reflect waves right at the shore, not offshore. Breakwaters are designed to weaken the energy before waves reach the shore, which is exactly what the question describes.