What is the falling action of Because of Winn-Dixie?

When Winn-Dixie and Opal go to Gloria Dump's party, Winn Dixie is scared by the thunder and runs away because he has a pathological fear. Opal and her dad spend hours looking for him, and opal confronts him on how he didn't bother looking for her mum, they go back to Gloria's and Opal finds out that Winn-Dixie was at the house the whole time she was looking for him. Then they all sit down and sing a song. :)