Beowulf's decisive victory over Grendel is symbolized by the act of tearing off Grendel's arm at the shoulder.
The final blow that signifies Beowulf's victory over Grendel in the epic poem Beowulf is when he rips off Grendel's arm at the shoulder. This act of tearing off Grendel's arm, which is displayed under the roof of Heorot, marks Beowulf's triumph over the vicious monster.
https://brainly.com/question/40226307