Do you have the excerpt from his speech you need to use?
I can help you if I have the excerpt otherwise I may give you the wrong answer.
The Friar's plan is foreshadowed from his first appearance in the play because the first lines the audience hears him say are all about the specific things he knows about plants. He knows exactly what each can do and it's clear that some of them are more dangerous than others when made into potions and mixtures.
The timing of the Friar's plan is critical because Juliet will appear dead for an exact amount of time. If she wakes up too early it will ruin the plan because then she will have to marry Paris, but if she wakes up too late she will be all alone in a tomb without a way to get out. The plan also relies on communication reaching Romeo in time so he knows she is not really dead.
The correct answer is logos. Logos is logical appeal, or the appeal to reasoning. Ethos is ethical appeal, or an attempt to make the speaker or writer appear trustworthy, and pathos is emotional appeal, or an attempt to make the reader feel strongly about the speaker or writer's topic. A harmatia, in literature, is a fatal flaw in a character, and has nothing to do with persuasion or rhetorical language, as far as I know.
Hope this helps!
