This is the scene where Ebenezer Scrooge and the Ghost of Christmas Past see how Scrooge was so greedy that he chose money over his love.
Scrooge is taken to his underpaid employee's house by the Ghost of Christmas Present. Scrooge saw how even though him and his family are poor, they are still happy and greatful.
Here, The Ghost of Christmas Future takes Scrooge to his own grave, showing him what would happen if his greediness wouldn't stop. Scrooge then begged for a second chance, promising to not be greedy and love Christmas.