Concept:Rocks used for construction must be hard, durable, and resistant to weathering.
Explanation:Granite is an igneous rock that is very hard, strong, and durable.
It is widely used for road construction, building foundations, and decorative building purposes.
Limestone is used mainly for cement, not strong road stones.
Basalt can be crushed for road aggregate but is less common for building blocks.
Graphite is soft and unsuitable for construction.
Answer:Granite