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.
An element in an effective argument is logical support because if you are trying to make you're argument effective, you need logical support to help your argument. Hope this helps!
Answer:
Lady Macbeth was a ruthless woman who basically called him a wimp and double dared her husband to kill a king.
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