The right answer is ductility.
A non-metal is a chemical element whose single-body atoms are joined by covalent bonds or intermolecular bonds, and not by metal bonds.
In their solid state, the nonmetals have dull or weakly shiny surfaces (although those of iodine have metallic reflections), are rather fragile and brittle (with the notable exception of diamond carbon), and are devoid of the elasticity, malleability and ductility characteristic of metals.