Final answer:
The writer's mention of being on TV serves to engage the audience by providing a relatable and influential context for the letter, thereby highlighting the importance and impact of her message.
Step-by-step explanation:
The writer emphasized her appearance on TV to make her letter more engaging and memorable. This strategy can help her achieve several objectives, such as drawing the audience's attention and presenting her thesis in a compelling way. Mentioning her TV experience serves as a hook, using a familiar reference to connect with the audience and illustrate the influence of media. By doing so, she might also intend to subtly sell herself, matching the rhetorical strategy used when writing application letters that focus on the value the applicant can bring to the company. This approach aligns with the writer's purpose to either inform or persuade, where establishing credibility or relatability can be crucial.