Which structure helps protect beaches from erosion?

Which structure helps protect beaches from erosion?

• A. Dams
• B. Jetties
• C. Sea Wall
• D. Barrier Islands

Answer: (C)

Protecting a beach from waves relies on structures that block or reduce wave energy. A sea wall sits along the shoreline and acts like a shield, absorbing and reflecting the force of incoming waves. That protection keeps the sand and dunes from washing away and helps prevent land behind the wall from eroding during storms. Dams protect rivers, not the ocean shore. Jetties stick out into the water to keep harbor entrances open, but they can alter how sand moves along the coast and sometimes move erosion problems to other areas. Barrier islands are natural sand barriers that help dissipate wave energy, but they aren’t built structures placed right on a specific beach like a sea wall.

Protecting a beach from waves relies on structures that block or reduce wave energy. A sea wall sits along the shoreline and acts like a shield, absorbing and reflecting the force of incoming waves. That protection keeps the sand and dunes from washing away and helps prevent land behind the wall from eroding during storms. Dams protect rivers, not the ocean shore. Jetties stick out into the water to keep harbor entrances open, but they can alter how sand moves along the coast and sometimes move erosion problems to other areas. Barrier islands are natural sand barriers that help dissipate wave energy, but they aren’t built structures placed right on a specific beach like a sea wall.