The strongest example of ethos in the monologue can be found in the speaker's use of personal experience. Throughout the monologue, the speaker shares stories and anecdotes from their own life that demonstrate their credibility and expertise on the topic. By providing evidence of their own experiences, the speaker is able to establish their authority and build trust with the audience. This is a powerful way to demonstrate ethos and is an effective tool for convincing the audience of the speaker's point of view.