Answer: the consequences of choices
Explanation: In this excerpt from Chapter 1 of "A Christmas Carol" by Charles Dickens, what the chain represents is the consequences of choices. Scrooge receives the visit of his dead partner's ghost. Jacob Marley's ghost is carrying a chain. The ghost tells Scrooge that he wears it as a punishment for his greedy life, and has come to prevent Scrooge from having the same fate.