Wires used in homes are usually covered with materials like plastic or rubber. The primary reason for doing this is to:

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Prevent rusting

Make handling easier

Prevent shocks and short circuits

Make them look beautiful

answer is C.

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Detailed Solution

Concept:
Electrical work cables are always protected with a rubber or plastic coating. These wires will have current flowing through them when the circuit is turned on. We are aware of the characteristics of substances like rubber and plastic. Here, such a quality is utilized.
Current will flow via these wires once the circuit is turned on. It is extremely threatening to human lives if the wires are not wrapped in an insulating material. The conducting wires have the potential to shock individuals. There will be multiple lines flowing through the same spot at the intersections as well. There is a danger that short circuits can occur and the appliances will sustain harm if the wires are not adequately insulated from one another. Even fires can result from short circuits. Therefore, leaving electrical cables without insulation is extremely risky. We are aware that plastic and rubber act as insulators and do not conduct electricity. The electrical lines are therefore insulated using materials like rubber and plastic.
Hence, the correct option is 3.

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