Final answer:
In the epic poem Beowulf, the hero leaves his home in Geatland to go to the land of the Danes, which represents the Epic Hero Convention of leaving the 'familiar world.'
Step-by-step explanation:
The example in Beowulf of the Epic Hero Convention: Hero leaves the 'familiar world' is A) Beowulf leaves Geat land to go to the Danes. In the epic poem, Beowulf travels from his home in Geatland to the land of the Danes to help them defeat the monster Grendel. This journey represents the hero leaving his familiar surroundings and venturing into the unknown to face a great challenge.