Answer the following question: Fact 1: Wiring requires an electrical conductor. Fact 2: Copper is a much better conductor. Given the two facts above, what does most wiring require?

Select from the following.
(1). water;
(2). fire;
(3). copper;
(4). heat;
(5). Proteins;
(6). tube;
(7). batteries;
(8). energy;
Answer:
(3).