Which term best describes a building material formed by mixing cement, sand, small stones, and water?

• A. Brick
• B. Mortar
• C. Concrete
• D. Stone

Answer: (C)

Mixing cement, sand, small stones, and water creates concrete. The cement acts as a binder that hydrates and hardens when water is added,牢 binding the sand and the aggregate (the small stones) to form a strong, solid mass. The sand provides fine filler, while the stones give bulk and strength for structural use. Mortar, by contrast, is a cement-sand paste (sometimes with lime) used to bond bricks or stones, not a heavy structural material like concrete. Brick and stone refer to the building units themselves, not the mixed material. So the best description of that mix is concrete.