Odysseus troubles began when he tells polyphemus his real name as he sails away from cyclops island. what are some reasons why odysseus identifies himself

One reason is that in ancient greece, people emphasized pride (hubris) and honor to their family name. he ends up telling Polyphemus his name because it was in his nature to show off and humiliate Polyphemus. another reason would be to continue the story.

hope this helped!

This would be third person because they are using the correct pronouns that belongs to third person like he, the name, etc