Concept:Mica is a mineral that conducts heat well but does not allow electricity to pass through.Explanation:In cooking utensils, we need a material that spreads heat evenly but is safe with electrical appliances. Mica fits this need. It has a layered silicate structure that lets heat travel through its particles. However, it lacks free electrons needed for electricity flow. Hence, mica is a thermal conductor but an electrical insulator. This combination makes it ideal for handles and heating elements in utensils.Answer:A. good conductor of heat but bad conductor of electricity