You are presented with the question "what conductor may become hot if exposed to heat?" and the following answer choices: 
- copper
 - metal
 - LEDs
 - gas
 - rubber
 - coal
 - oxygen
 - Oak

Now knowing that if a thermal conductor is exposed to a source of heat then that conductor may become hot and metals are also known as being good conductors of heat, or thermal conductors, choose the best answer.


 

  metal       