What role does the ghost of Marley play in the heralding events to come in the plot?

Marley warns Scrooge to fix his ways before its too late.

Explanation:

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.

a. "how old man winter was driven back” and “ormuzd and arimanes"