Which of the following is a peace officer's responsibility in law enforcement?

A peace officer's responsibility in law enforcement includes ensuring that laws are enforced fairly and impartially. This involves applying the law consistently to all individuals, regardless of their background or circumstances. Such fairness is a fundamental principle of justice, which helps to maintain public trust and respect for law enforcement. When officers carry out their duties with impartiality, they not only uphold the law but also foster a sense of community and safety among citizens.

Other options, in contrast, do not align with the core duties of a peace officer. Ignorance of the law is not a viable approach for law enforcement, as officers are expected to have a thorough understanding of legal statutes. Partial enforcement undermines the integrity of the law, as it suggests that some individuals may receive preferential treatment while others do not. Relying solely on personal discretion can lead to inconsistent applications of the law, which can create perceptions of bias and unfairness. Thus, the commitment to fair and impartial enforcement is paramount in the mission of law enforcement professionals.