Question

why do engineers cover copper wires with plastic?
to help the wire conduct better
to keep the metal from rusting
to make the wires stronger
to block electricity from escaping
question 5

Explanation:

Plastic is an insulator. Insulators do not conduct electricity. Covering copper wires (which are good conductors) with plastic helps prevent electricity from escaping and also protects people from electric shocks. Copper does not rust easily (it oxidizes to form a green patina but not rust like iron). Plastic covering does not make the wire conduct better (copper's conductivity is inherent). While plastic can add some minor strength, the main purpose is electrical insulation.

Answer:

To block electricity from escaping