Science question ?

...I would say that's because from what you're given, wax is a hydrocarbon, which only have London dispersion forces holding the molecules together. Since London dispersion forces are the weakest intermolecular forces, this could be why wax has such a low melting point--it doesn't take much energy to break those bonds. I'm not exactly sure what the question wants in referring to using the fact that wax is a molecular solid, sorry...