Which of the following is true about granite?

Granite is an igneous rock that forms from the cooling and solidification of molten magma beneath the Earth's surface. This process gives it a crystalline structure, characterized by its durability and a wide range of colors and patterns. The correct understanding of granite as a solidified product of molten rock highlights its unique properties, which make it an ideal material for countertops, flooring, and other architectural applications due to its strength and resistance to scratching and heat.

The other options misrepresent important facts about granite. For instance, it is not a sedimentary stone; instead, that classification pertains to rocks formed from the accumulation of sediments. Additionally, granite is not commonly used in roofing applications like some other materials. Lastly, granite is actually harder than marble, which is a metamorphic rock and is susceptible to scratching and damage more so than granite. Thus, acknowledging the correct answer about granite forming from molten material provides a solid foundation for understanding its characteristics and uses in interior design.