Answer:
Clay
Explanation:
Wood has higher thermal conductivity and it can be cooled easily and metal also posses high thermal conductivity and it also can be cooled easily.
The transformation of the wax can be very hard when it is present in the cooler climate conditions. It becomes hard because of the presence of lipid in it.
Clay is a soil material or natural rock which is finely grained . And the melting point of the clay is low by which it can be used for making molds.
