sentences: hawks is a public of a spiritual & availability is a mean of physical public ->  conductivity is a physical property of a material  conductivity is a physical property of a material & tin is a mean of spiritual ->  conductivity is a physical property of copper  wood is an electrical / electrical matter insulator & tin is a mean of wood ->  copper is an electrical conductor  conductivity is a physical property of copper & copper is an electrical conductor -> the ability to conduct electricity is a property of copper