Which term describes a coastal defence using low walls built into the sea?

Which term describes a coastal defence using low walls built into the sea?

• A. Groynes
• B. Hard engineering
• C. Green belt land
• D. Flood protection

Answer: (A)

Understanding how coastal defences are named and how they work. A groyne is a low wall built out from the shore into the sea. It interrupts longshore drift, causing sand to accumulate on the up-drift side and creating a wider beach that helps absorb wave energy and protect the coast in that area. This is the specific term for the described structure. In contrast, hard engineering is a broad category of engineered coastal protections, not the name of a particular feature. Green belt land refers to protected countryside inland, not a coastal defence, and flood protection is a general idea rather than a specific device.

Understanding how coastal defences are named and how they work. A groyne is a low wall built out from the shore into the sea. It interrupts longshore drift, causing sand to accumulate on the up-drift side and creating a wider beach that helps absorb wave energy and protect the coast in that area. This is the specific term for the described structure. In contrast, hard engineering is a broad category of engineered coastal protections, not the name of a particular feature. Green belt land refers to protected countryside inland, not a coastal defence, and flood protection is a general idea rather than a specific device.