How is Scrooge's nephew different from Scrooge

Scrooge and his nephew are character foils (opposites). Scrooge's nephew is happy and giving while Scrooge is miserable and miserly. Fred is happy, joyful, full of love and charity. He doesn't worry about money and has happily married the woman he loves. Regardless of how Scrooge treats him, Fred is respectful and open.... he is a generous man.