Concept:Shale changes into slate through the process of metamorphism.
Explanation:When shale is subjected to high heat and pressure deep underground, it undergoes metamorphism.
This process transforms the soft, layered sedimentary rock into a harder, fissile metamorphic rock.
The resulting rock splits easily into thin, flat sheets, and this rock is known as slate.
Among the options given, only slate is the correct metamorphic product of shale.
The other rocks are formed from different parent materials.
For example, marble forms from limestone, while quartzite forms from sandstone.
Limestone is a sedimentary rock and is not derived from shale.
Therefore, shale under regional metamorphism becomes slate.
Answer:Slate (Option B).