Shale on metamorphism changes to

Correct option is C

The correct answer is (C) Slate

Explanation:
• Metamorphism is the transformation of existing rock types (igneous or sedimentary) into new forms due to high heat and pressure.
• Shale is a fine-grained sedimentary rock composed of mud and clay. Under low-grade metamorphic conditions (moderate pressure and heat), shale transforms into Slate.
• Slate is characterized by its ability to be split into thin, durable sheets (slaty cleavage).
• If metamorphism continues, slate can further transform into Phyllite, then Schist, and finally Gneiss.

Information Booster:
• Rock Cycle: Igneous $\rightarrow$ Sedimentary $\rightarrow$ Metamorphic.
• Foliation is a feature of many metamorphic rocks where minerals are aligned in layers.
• Slate is traditionally used for roofing, flooring, and writing blackboards.

Additional Knowledge:
• Quartzite (Option A): Formed from the metamorphism of Sandstone.
• Marble (Option B): Formed from the metamorphism of Limestone or Dolomite.
• Basalt (Option D): An igneous rock formed from the rapid cooling of magnesium-rich and iron-rich lava.