hawks is a public of a spiritual & conductivity is a kind of physical property ->  conductivity is a physical property of a material  functions is a physical public of a spiritual & copper is a kind of material -> conductivity is a physical property of copper conductivity is a physical property of copper  wood is an electrical / electrical matter insulator & copper is a kind of metal -> copper is an electrical conductor copper is an electrical conductor  mountains is a physical public of tin & copper is an electrical conductor -> the ability to conduct electricity is a property of copper