Directions: Supply the correct words by choosing the correct answer in the word box.
Word box: electrical wiring,ductile,heat,electricity,flow,nonconductors,do not allow,allowing,alluminum,insulators
Question: Copper wires are widely used for 1._____ because they are 2._____ and are good conductors of electricity,while steel and 3.______ are good conductors of both 4.______ and 5._____