Demeter finds out that Persephone has eaten of the pomegranate that had been offered her by Hades.
Prehistory is the history before any records (as in, detailed reliable records, such as writing), for which only very indirect evidence is available such as archaeological funds. So- there could be no weather reports from pre-history! if there were, we would call this time "history" - the correct answer is d.
They have been found on oracle bones
Human activities contribute change- by change in the earths surface