the deeper he goes into Hell, the lower levels of it, the sins become worse. Starting from Limbo, where the sinners haven't committed anything that serious, until he gets to the ninth circle where the worst sinners are.
I believe it is a claim because it does focus on the main idea and what the text/passage should be about. If not I deeply apologize.
Korean families have a tradition to arrange their children's wedding. In this story the Korean family is shown as gold diggers as they are looking for an eligible husband for their daughter, but they don't pay attention to what their daughter wants.
The father rat is very selfish and adamant to his decision. He should ask his daughter about her preference and money is always not the only factor that can keep you happy.