Ethos does which of the following?

appeals to the audience's logic
appeals to the audience's emotions
appeals to the audience's ethics
none of the above

The answer is: appeals to the audience's ethics.

In rhetoric, ethos is one of the three modes of persuasion (the other two being pathos and logos). Ethos, in particular, according to Aristotle, refers to the speaker´s moral competence, expertise or knowledge, but even though it springs from the speaker, it is the audience that should determine the value of the ethical or moral grounds laid by the speaker, so that it becomes an appeal to the audience´s cultural and historical appraisal of what is morally valuable in the speaker´s argument, making the argument more or less persuasive.  

his humanity shines from every page as he bears witness to the tragedy which befell the jewish race at the hands of the nazis. wiesel was a romanian-born jew whose home town of sighet was occupied by the hungarians for most of the second world war. in may 1944, all the jews in the area were forced into cattle wagons and transported to auschwitz.

we know that, volume of a rectangular prism is given by :

✿   {length × width × height}

given : the length of rectangular prism = 5.5

given : the width of rectangular prism = 6

given : the height of rectangular prism = 3

⇒ the volume of given rectangular prism = {5.5 × 6 × 3}

⇒ the volume of given rectangular prism = 99