Property of metal by which it can be drawn into wires is called ______.

Ductility is the mechanical property of a metal that allows it to be permanently stretched, or drawn, into a thin wire under tensile (pulling) stress without breaking. It occurs because layers of metal atoms can slide over one another while metallic bonding still holds the structure together.

Wire drawing is exactly this process: the metal is pulled through a die so that it elongates lengthwise into a wire. The blank in the question therefore names the property that lets a metal be stretched this way, which is ductility. Gold, silver, and copper are highly ductile and are commonly drawn into fine wires.

Why the other options don't fit:

• Malleability is about being hammered or rolled into thin sheets under compressive force — a different mode of shaping from stretching lengthwise into a wire.

• Sonority is about the ringing sound a metal produces when struck — an acoustic property, unrelated to how far it can be stretched.

• Lustre is about the shiny appearance of a freshly cut metal surface — an optical property, unrelated to stretching.

So the blank is correctly filled by ductility.