Final answer:
Zeus's primary fault was his arrogance and pride, known as hubris, which is a common flaw within Greek mythology associated with gods and heroes.
Step-by-step explanation:
Zeus's chief fault was a) Arrogance and pride. In classical mythology and literature, hubris is considered a typical fault of the gods and heroes, marking an excessive amount of self-confidence and disdain for the natural limits of the individual. Zeus, the chief of the Greek gods, is often depicted as having this fault, displaying an overbearing pride and arrogance.