The study of rocks is called petrology.
The correct answer is B.
Explanation:
All the rocks present in the earth is present during ancient times during the formation of the earth's atmosphere.
Due to the presence in the upper surface of the earth, the color of the rocks is changed.
Hence, the correct answer is B Yes, if the sedimentary rock is moved below Earth’s outer layer and exposed to  energy from Earth’s interior, can melt into liquid rock and form igneous rock.