Answer:
3.Sedimentary rocks are the only rocks that are weathered. Igneous rocks can change to sedimentary rocks.metamorphic rocks by heat and pressure. All rocks can be melted and cooled to form igneous rocks.
Explanation:
Sedimentary rocks as the name implies are made up of rock sediments which are formed by weathering processes.
Igneous rocks are the rocks which gives rise to sedimentary rocks and metamorphic rocks under certain conditions such as heat and pressure.
All the type of rocks can also be melted and cooled to form back to igneous rocks.