What type of persuasive technique is used by champion tennis player Wendy Star in her endorsement?

The use of testimonials as a persuasive technique involves individuals sharing their personal experiences or endorsements of a product or service, often to establish credibility or trustworthiness in the eyes of potential consumers. In the context of champion tennis player Wendy Star endorsing a product, her status as a successful athlete provides an authoritative voice that can influence purchasing decisions.

When someone well-respected or admired in a particular field, like Wendy Star in tennis, endorses a product, audiences are more likely to perceive the product as credible or effective based on her positive experiences. Her endorsement serves as a powerful testimonial that not only highlights the product but also connects her achievements in sports with the quality or efficiency of the item being promoted. This approach capitalizes on her credibility and allows her audience to relate to her success, encouraging them to trust her opinion and consider the product favorably.

The other options like statistics, emotional appeal, and repetition, while also effective persuasive techniques, do not specifically pertain to personal endorsement or shared experience which is a hallmark of testimonials.