Which definition is the BEST definition of an epic?

An epic is a lengthy narrative poem that typically recounts the heroic deeds and adventures of legendary figures or historical events, often reflecting the values and beliefs of a culture. It usually includes elements such as a vast setting, elevated language, and supernatural forces. Epics are characterized by their grand scale and the exploration of themes like honor, bravery, and the struggle between good and evil. Examples include "The Iliad," "The Odyssey," and "Beowulf."