In which stage have individuals made a commitment to change their behavior?

The correct answer is the preparation stage. In the preparation stage of behavior change, individuals have recognized the need to change and have made a commitment to do so. They are actively planning for how they will implement this change and may be taking small steps toward their goal, such as gathering information or resources, setting specific objectives, or seeking support. This stage is characterized by a readiness to take action, highlighting the individual's proactive approach to changing their behavior.

In the contemplation stage, individuals are aware of the issue and are considering the possibility of change, but they have not yet committed to taking action. The pre-contemplation stage is even earlier, where individuals may not acknowledge that they have a problem or need for change. The action stage follows preparation, where individuals put their plans into motion and actively engage in behaviors aimed at change.