Mary Jones, who has chickenpox, should stay home from school.
Ethos is appeal to authority; it uses examples from people who hold power or those the audience would trust, such as celebrities, politicians, etc. Pathos is appeal to emotion; examples would be the SPCA commercials, talking about starving children, anything that stirs up emotion in your audience. Logos is appeal to logic; it uses step by step explanations and common knowledge to get the point across.
Answer and Explanation:
The frame to which the question refers, are the letters of Robert Walton, presented in the book "Frankenstein." In these letters Walton tells his sister about witnessing the creation of Victor Frankenstein. This enhances and improves the story, as it shows that the entire Victor Frankenstein narrative is real. That's because Victor Frankenstein's story of creating a man through pieces of dead people is very surreal and fanciful, but when Walton confirms that this actually happened, we can trust that Victor Frankenstein is telling the truth and not fantasizing in a crazy way. This is mainly due to the fact that Walton is also a science lover like Victor Frankenstein, but he is more rational and less eccentric, which allows the reader to trust that the story is true, even if he is suspicious of Victor Frankenstein.