I would say the introduction. Because those are questions and you answer questions and solve them in the body.
The correct answer is plot. Theme is the work's main idea (the "why" of the work), and there usually are more themes in a single work. Narrator is the "I" of the story, someone who tells it. The setting is the "when and where" of the story, the time-place frame. The plot is the "what" - what happens.
Answer: Her face and a mirror.
Explanation:
In the passage, the speaker makes direct reference to (her) face being like a mirror, reflecting how he felt and showing his own expressions and thoughts.
