Dear Student
A non-aqueous solution is the one in which the solvent is not water.
Bronze is an alloy composed of copper and tin. It is non-aqueous because while making it water is not used. Rather, copper and tin are melted and combined to make bronze. Bronze is a homogeneous mixture of copper and tin.
Moreover, it is widely available in solid form, so the term "solution" is not applicable. But even in the melted form, bronze is non-aqueous, as no water is added as a solvent.
Regards