Final answer:
The Argo's piece of oak from Dodona was believed to predict the future, helping the Argonauts in their mythical quest.
Step-by-step explanation:
In Greek mythology, the Argo contained a magical piece of oak from the sacred grove of Dodona, which was said to have the power to predict the future. According to legend, this piece of oak could provide the Argonauts with prophecies, aiding them in their quest for the Golden Fleece. The voyage of the Argo is a well-known mythological journey, and the abilities of this piece of wood were a key part of their success, according to the stories.