What lines explain why swords were useless against Grendel?

745 to 752

767 to 774

798 to 805

810 to 817

The correct answer is 798 to 805.

These are the lines from the poem:

798. their praised prince, if power were theirs;

799. never they knew,-as they neared the foe,

800. hardy-hearted heroes of war,

801. aiming their swords on every side

802. the accursed to kill,-no keenest blade,

803. no farest of falchions fashioned on earth,

804. could harm or hurt that hideous fiend!

805. He was safe, by his spells, from sword of battle,

As you can see in these lines, there are some spells that Grendel cast which protect him from blades. Beowulf managed to kill him only using his bare hands.

798-805. I just had this question and i got it right