Reread lines 215-222 what happens in these lines? why is it important that we seen wiglafs courage in battle as well as his loyalty to beowulf

In the battle against the dragon, Wiglaf displayed courage and loyalty - which are the most valued virtues in Beowulf. With Wiglaf's help, Beowulf is able to defeat the dragon and presenst him with his golden necklace as a symbol of transfered power from a king to his chosen successor.

it exposes the hypocrisy of religion and christian supporters of slavery

explanation:

the silver bells of the sleds are merry and keep time in the winter nights while the sky twinkles happily. the golden bells of weddings are delightful in their peaceful happiness, foretelling a rapturous future. meanwhile, the brazen alarm bells scream frightfully in the night, with a discordant and desperate sound. in their clamor, these bells convey terror, horror, and anger. finally, the iron bells are solemn and melancholy, while those in the church steeple are like ghouls who feel happiness. the king of the ghouls, who rings the bells, cheerfully keeps time with the moaning and groaning bells.