Final answer:
The enduring theme of Beowulf is due to its portrayal of an epic hero and its relevance in current stories.
Step-by-step explanation:
The enduring theme of Beowulf can be attributed to its portrayal of an epic hero and the relevance of this concept in current stories. Beowulf, as an epic poem, tells the tale of a heroic warrior who battles against monstrous creatures to protect his people.
This theme is seen in many contemporary stories, such as Marvel comics and superhero movies, where characters with exceptional abilities fight against evil forces. The reason why Beowulf is enduring is because it explores universal themes, like heroism and the struggle between good and evil, which continue to captivate readers and resonate with them today.