Which of the following represents an investigative step that involves formal consequences?

The choice that represents an investigative step involving formal consequences is the issuance of a warning. This action typically signifies that a specific behavior or violation has been noted, and it is a formal part of the disciplinary process. Warnings serve to inform the individual that their conduct is not acceptable and that there are repercussions if the behavior continues. This formal documentation can be part of an ongoing personnel file and may impact future evaluations or actions taken against the individual.

Other options, such as meal breaks and personal breaks, do not have formal consequences attached to them; they are simply part of work routines that allow employees to recharge. Paperwork, while it may be necessary for an investigation, does not inherently carry a consequence unless it pertains to an action like issuing a warning or documenting a violation. Consequently, the issuance of a warning is fundamentally tied to accountability and the potential for further disciplinary measures, distinguishing it clearly as the correct answer.