Gabions are best described as:

Gabions are best described as:

• A. Rock-filled wooden boxes
• B. Plastic bins filled with water
• C. Steel mesh cages filled with small rocks
• D. Concrete blocks arranged in tiers

Answer: (C)

Gabions are rock-filled steel mesh cages used for erosion control and slope stabilization. They consist of wire mesh baskets that are filled with stones and stacked to form retaining walls, channel linings, or bank protections. The combination of heavy rock mass with a permeable steel cage lets water pass through while resisting movement, making gabions flexible and durable on uneven ground. They’re different from wooden boxes filled with rocks, which would rot; plastic bins filled with water, which don’t provide the necessary mass or drainage behavior; and concrete blocks, which are rigid and non-permeable.

Gabions are rock-filled steel mesh cages used for erosion control and slope stabilization. They consist of wire mesh baskets that are filled with stones and stacked to form retaining walls, channel linings, or bank protections. The combination of heavy rock mass with a permeable steel cage lets water pass through while resisting movement, making gabions flexible and durable on uneven ground. They’re different from wooden boxes filled with rocks, which would rot; plastic bins filled with water, which don’t provide the necessary mass or drainage behavior; and concrete blocks, which are rigid and non-permeable.