You are presented with the question "What is absolutely required for wiring to work??" and the following answer choices: 
- increases a body's strength
 - heat is produced
 - The opposite of an insulator.
 - Something that comes in a bundle of fibers
 - quart or nickel plated aluminum
 - To another location like underground
 - underground systems
 - Time and energy

Now knowing that wiring requires an electrical conductor and an insulator is the opposite of a conductor, choose the best answer.


 

   The opposite of an insulator.      