Answer:
Sedimentary rocks are changed to metamorphic rocks due to subduction and temperature.
Step-by-step explanation:
- Metamorphic rocks are made up of other existing rocks like Igneous rocks and Sedimentary rocks.
- When the existing rocks are subjected to enough pressure and temperature, they undergo permanent deformation and are turned into metamorphic rocks.
- The pressure exerted on the already existing rocks is mainly due to the subduction activity of the plates. The formation of metamorphic rocks mainly occurs below the Earth's surface.