Why is gold used for making expensive jeweleries two reason
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Gold doesn't corrode and can be melted over a flame, making it easy to work with and stamp as a coin. Silver and gold are beautiful metals that are easy to form into jewelry, and both of these precious metals have their own devotees in fine-jewelry circles.

Explanation:

Gold is used to make jewellery because of the attractiveness of its luster and because of its rarity. It also doesn't tarnish and doesn't react with air the way a metal like iron does. Therefore, gold is alloyed with other metals to make it stronger

Gold does not tarnish rust or corrode.

Gold is also the most important metal in jewellary making due to it's luster and other qualities.

Explanation:

i'm assuming that it's c.) red bank..