Final answer:
An influencer promoting a protein bar is an example of referent power; this form of power is based on admiration and the desire of others to identify with the influencer, rather than on a formal position of authority. So, the correct option is an influencer promote a protein bar.
Step-by-step explanation:
Referent power, as defined by French and Raven in their five forms of power, is derived from being admired and respected. It is the power that comes from the desire of others to identify with the referent. Identifying your reference groups, which can include cultural centers, workplaces, family gatherings, or even media figures, is crucial as they influence your behavior and establish social norms, even if it's done subconsciously.
When examining the given scenarios for an example of referent power, we look for a person who influences because others admire or want to be like them, not because of a formal position or authority they hold. Out of the provided options, an influencer promoting a protein bar demonstrates referent power. The influencer has no formal authority over their audience but wields influence because people admire them or aspire to have a similar lifestyle, and thus are persuaded by the influencer’s endorsements. Within the realm of power and authority, Max Weber's definitions are pivotal. He categorized authority into traditional, charismatic, and rational-legal, with the latter two being relevant to the concept of referent power as they are based on a person’s personal qualities and persuasive, rather than coercive, influence.