The granite rocks are formed by the slow crystallisation of the magma below the earth surface, due to slow crystallisation of the magma, the rocks formed are uniform, and have no layers.
The gneiss rocks are formed by the metamorphosis of the granite and the sedimentary rocks. They are formed by the action of high temperature and high pressure. The gneiss rock is layered caused by the segregation of different types of rock, mainly made up of light and dark silicates.
Hence, the correct answer is option
C. Granite is formed due to the slow cooling of magma below Earth's surface and gneiss is formed due to metamorphosis.
