What indicates that a material has very good ductility?

Ductility refers to a material’s ability to undergo significant plastic deformation before rupture or fracture. When a material can be drawn into wires without breaking, it demonstrates exceptional ductility. This property is crucial in applications where materials need to be shaped or formed, as it allows them to stretch without losing integrity.

Being able to be pulled into thin wires suggests that the material can endure tensile stress effectively, turning into a wire with reduced cross-sectional area while maintaining its structural properties. This capability is especially important in industries that rely on materials for wiring, cables, and other applications where flexibility and strength are essential.

The other choices describe contrasting properties. High resistance to deformation often signifies a material's hardness or brittleness, rather than ductility. The capacity to break easily under stress is a sign of brittleness, and a low yield strength does not directly relate to the material's ability to be drawn into wires, as it could indicate a tendency to deform irreversibly without significant ductility.