What material is known to prevent the transfer of heat or electricity?

The material that is known to prevent the transfer of heat or electricity is an insulator. Insulators are substances that do not conduct heat or electricity effectively, meaning they resist the flow of heat or electric currents. This property makes insulators essential in various applications, such as electrical wiring, where they prevent unwanted current flow and protect against electrical shocks. Common examples of insulators include rubber, glass, and certain plastics. These materials help maintain safety and efficiency in electrical systems by ensuring that heat does not escape easily and electricity does not leak where it shouldn't.