Concept:Marble is a metamorphic rock formed when limestone changes under intense heat and pressure.
Explanation:Limestone is a sedimentary rock composed mainly of calcium carbonate (
CaCO3).
When limestone is subjected to high temperature and strong pressure inside the Earth's crust, it undergoes metamorphism.
The calcite grains in the limestone recrystallize and interlock to form a harder, crystalline rock.
This new rock is called marble.
Gabbro, granite, and basalt are igneous rocks, not parent rocks of marble.
Answer:D. limestone