Grendel’s behavior contributes to the overall theme because;
A central theme of the poem, "Beowulf", is the battle between good and evil.
The consistent deaths caused by Grendel were representative of evil while the oppressed kingdom and Beowulf who volunteered to rescue them from the clutches of the monster were representative of good.
In the end, good triumphed over evil when Beowulf won against Grendel.
Learn more here:
https://brainly.com/question/1830314