Answer:
Rocks can undergo transformations from one type to another through geological processes. The most common way for this to happen is through heat and pressure. When rocks are subjected to high temperatures and pressures, such as those deep within the Earth's mantle, they may recrystallize into a different form. For example, shale, a sedimentary rock, can undergo heat and pressure to become metamorphic rock such as slate or marble. Another way that rocks can change is through chemical reactions, such as the alteration of igneous rocks through the reaction with surrounding water or air. In some cases, sedimentary rocks can also become compacted and cemented, turning into a different type of sedimentary rock, or even into metamorphic rock. Understanding how rocks change and the processes involved is crucial for geologists as it provides insight into the Earth's history and evolution.