Why are electric wires made of copper or aluminium and not of silver even though it is a good conductor of electricity

Because silver ic costly than copper

CUZ SILVER IS COSTLY

It is only because silver is so much costly

Its because the sliver is expensive than copper or aluminium.

It is too expensive than copper and aluminium

IT IS BECAUSE COPPER AND ALLUMINIUM ARE NOT SO EXPENSIVE WHEREAS SILVER IS SO EXPENSIVE.