The details from the excerpt support which central idea?

it supports the central idea which is the main cause of the authors writing or scripting it also affects it so that the people can get to know more about the particular book and makes us know about the central theme or climax

it's called a epic poem i believe, hope this ☺

you need to make an explanation. so, since you did not include one, so no one, and i mean no one can unfortunately you,