Final answer:
Copper and gold are good conductors of both electricity and heat, while air is an insulator. The correct options are 1 and 3.
Step-by-step explanation:
The materials listed below that are good conductors are copper and gold. Copper is widely recognized as one of the best electrical conductors due to its high conductivity, flexibility, and ductility. Gold, although not as conductive as copper, is still considered a good conductor of electricity.
Both metals are also excellent thermal conductors, which is why they are often used in cooking utensils and electronic devices. On the other hand, air is a poor conductor of electricity and heat, and is better classified as an insulator.