The text's author uses analogical evidence. This kind of argument tries to make whatever it is being explained easier to understand, using comparisons between the object of the text and other object that shares some of it's similarities, but it's somehow more relatable to the reader. In the example, Eric Schlosser tries to explain how the McDonald's ovens work by it's appearance to that of commercial laundry presses.
Some themes you might consider in the play include:
Greed Power and ambition What it means to be masculine and feminine Trying to persuade Idealism What it means to be a (good/bad) leader The importance of omens The difference between villains and heroes
The sixth amendment guarantees fair and speedy trial by a jury of your peers and the right to know your accuser and their accusations. Additionally, the sixth gives us the right to counsel and to present witnesses.