What are the three key themes Fred represents? = Christmas spirit, love, and family.
"I mean to give him the same chance every year whether he likes it or not." = shows how generous Fred is towards scrooge and despite scrooges constant dismissiveness of Fred's efforts. Fred is still willing to give scrooge that "chance"
"Merry christmas uncle! God bless you." = shows that fred is kind to scrooge even though scrooge is cruel to him.
"What right do you have to be miserable? You're rich enough." = questions scrooges depressing nature.