Concept:Igneous rocks are formed when molten magma or lava cools and solidifies.
Explanation:Sandstone is formed by the compaction of sand particles, making it a sedimentary rock.
Granite is formed when magma cools slowly below the Earth’s surface, making it an intrusive igneous rock.
Chalk consists of compressed remains of marine organisms, so it is sedimentary.
Limestone is formed from calcium carbonate deposits, so it is also sedimentary.
Among these options, only granite is an igneous rock.
Answer:Granite