Answer:
These chains are made of steel and are weighed down with "cash-boxes, keys, padlocks, ledgers, deeds, and heavy purses." ... This chain, then, is symbolic of Marley's business affairs and his pursuit of wealth when he was alive. Like Scrooge, he focused on enriching himself instead of caring about the plight of others.
Step-by-step explanation:
Scrooge will learn that the chain serves as Marley's punishment. As those things were his only concern in life, Marley must carry them now and forever. Further, Scrooge learns that he himself has already forged a similar chain—but for seven years longer. Marley's appearance warns Scrooge of his potential fate.