Final answer:
In 'Beowulf,' Grendel is portrayed as a descendant of Cain, emphasizing the themes of good versus evil and the monstrosity of Grendel.
Step-by-step explanation:
In the epic poem “Beowulf”, the monster Grendel is considered to be a descendant of Cain. The story reflects this lineage by depicting Grendel as an outcast, cursed by God and descended from the biblical figure known for committing the first murder. This connection to Cain emphasizes the theme of good versus evil and the vengeful nature of Grendel, who ravages the hall of Heorot, bringing chaos until Beowulf confronts him.