Ceramic tile is made from which material and hardened how?

• A. Glass, cooled
• B. Clay, hardened in fire
• C. Metal, heat-treated
• D. Plastic, cured

Answer: (B)

Ceramic tile is made from clay and natural minerals, and it becomes hard through firing in a kiln. The heat fuses the clay particles and any glaze to create a durable, solid surface. This firing step is what distinguishes ceramic tile from materials that harden by cooling or curing. Glass involves melting and cooling from a liquid form, metal tiles use metal and heat treatment, and plastics rely on polymer curing. So the best description is clay-based material hardened in fire.