Well first you need to know what it means. And ethos is the appeal of ethics and is a means of convincing someone of the character and credibility of the persuader. So what you would need to do would be to try convincing your reader that they should see your topic the way you see it, and saying this is why. best thing to do is to use i feel statements. (For example i feel it should be this way because...........) then give your reason. If your writing your essay based on a book, make sure you give descriptive details from the book. Hope this helps. :)
