It is the _____ of every peace officer to preserve the peace within the officer's jurisdiction.

The term "Duty" accurately encapsulates the role of a peace officer in maintaining law and order within their jurisdiction. In the context of law enforcement, officers are sworn to uphold the law and are given the authority and obligation to act in ways that ensure public safety and peace. This is a fundamental concept in the Code of Criminal Procedure, which emphasizes that peace officers have a formal and legal obligation to prevent breaches of peace, protect communities, and enforce laws.

The designation of "Duty" implies a moral and legal commitment that is inherent to the position of a peace officer. It carries connotations of accountability and responsibility under the law, making it the most fitting term among the options presented. Other terms may suggest some level of commitment, but they do not convey the same level of obligation and authority expected from peace officers in their role.