Which action represents a formal termination of driving privileges by the department?

Revocation is a formal termination of driving privileges by the department. When driving privileges are revoked, it indicates that the individual has lost their right to drive for a certain period or possibly indefinitely, depending on the circumstances surrounding the revocation. This action is typically taken due to serious violations of motor vehicle laws, such as repeated offenses, driving under the influence, or other significant infractions.

In contrast, cancellation refers to the nullification of a driver's license, often due to failure to meet certain requirements, but it does not imply a temporary disciplinary measure like suspension. Suspension, on the other hand, allows for the eventual reinstatement of driving privileges after a designated period or upon meeting certain conditions. Amendment pertains to changes made to the status of a license or its limitations rather than a termination of privileges. Thus, revocation is the most definitive action that permanently removes driving rights, making it the correct choice in this context.