Which property helps in making copper wires?

Correct answer: Ductility

Ductility is the property of a material that allows it to be drawn or stretched into thin wires without breaking. Copper has considerable ductility, which is why it can be processed into long electrical wires and other thin forms. The property does not mean that copper dissolves, evaporates, or breaks easily.

Thus option B, ductility, is correct. Brittleness would make a material crack or break during drawing, which is the opposite of what wire-making requires. Volatility concerns how easily a substance changes into vapour, while solubility concerns dissolving in a solvent; neither property explains the formation of copper wire. The clue is the word “wires”: drawing a metal into wire is directly associated with ductility.