Answer:
To deposit into an account
Step-by-step explanation:
From the sentence given, "There was a long line of people and all of the tellers were busy helping customers, many of whom were there to bank their paychecks" the correct definition of the multiple-meaning word "bank" as it is used in the sentence is to deposit into an account.
Remember that the sentence said that people were in a long line and tellers were helping customers and that a majority of them were there to bank their paychecks which means they were there to deposit into an account.