What best describes a person who can influence the actions of others?

A person who can influence the actions of others is best described as a motivator. This term encapsulates the ability to inspire, encourage, or provide the necessary drive for individuals to take a specific course of action or achieve their goals. Motivators possess qualities that resonate with others and can affect their attitudes and behaviors in a positive and constructive manner.

In contrast, while an instructor imparts knowledge and skills, their primary role is to teach rather than to directly influence behavior. A peer may have a degree of influence based on shared experiences or camaraderie but does not inherently possess the same motivational qualities as someone specifically identified as a motivator. An administrator might implement policies or provide guidance; however, their focus is more oriented towards management and organization rather than directly inspiring action in others. Thus, motivator is the most fitting descriptor in this context.