Which type of rock undergoes metamorphism?

The correct answer is that both igneous and sedimentary rocks can undergo metamorphism. Metamorphism is a geological process that alters the minerals and texture of rocks due to changes in temperature, pressure, or the presence of chemically active fluids.

When igneous rocks, such as granite, are subjected to extreme pressure and heat, they can transform into metamorphic rocks like gneiss. On the other hand, sedimentary rocks, such as limestone, can also change under similar conditions, metamorphosing into marble. This illustrates the dynamic and interconnected nature of rock types within the rock cycle, showcasing how various geological processes can contribute to the transformation of rocks. Thus, both igneous and sedimentary rocks are capable of undergoing metamorphism, making the answer comprehensive and accurate.