metal-heavy,hard and good conductor

polymers- brittle

ceramics-hard but easily to break

Answer:

Metal-

a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity.

Polymers-

a substance that has a molecular structure consisting chiefly or entirely of a large number of similar units bonded together.

Ceramics-

pots and other articles made from clay hardened by heat.