Concept:Limestone is a sedimentary rock that changes into marble through metamorphism under great heat and pressure.
Explanation:Heat and pressure cause the calcite crystals in limestone to recrystallise.
This process is called metamorphism.
No melting occurs during this change.
Marble is the metamorphic equivalent of limestone.
Slate is formed from shale, graphite from organic matter, and gneiss from granite.
Since limestone specifically produces marble under these conditions, the correct option is the one that names marble.
Answer:C. marble