I believe the correct answer is - <span>Garcia uses formal, academic language and location words to suggest a theory about fate.
As you can see in the excerpt above, Garcia is using words such as vagaries, happenstance, etc, which are not normally used in everyday conversations. Thus, they are a bit formal, academic, and suggest a certain message in the text.
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I don't know which edition you're referring to. I suppose the lines 43-58 are actually the third paragraph. So, here's the answer:
The narrator's relationship with her husband has changed because of a supernatural influence that she can't exactly explain or fathom. She doesn't really know what happened, when, or why, but at night her husband was not the same person she married. "It’s the moon’s fault, and the blood. It was in his father’s blood," she reasons. Her husband is alienated because of this, and somehow she feels that they don't belong together anymore. He goes out to find those who are like him. "Something comes over the one that’s got the curse in his blood, they say, and he gets up because he can’t sleep, and goes out into the glaring sun, and goes off all alone — drawn to find those like him."
The example that best describes it is the 1st one; since "dramatic irony" occurs when the audience (<em>readers</em>) understands what's going to happen, and knows about certain characters' actions, or event, and the characters are unaware of it; hence the characters actions go on a different way.
The tactic is used to make the audience more involved; thus it often creates this feeling of being powerless in the readers' mind, to do anything about it.
So the best statement is: "<em>The reader knows that the human neighbors plan to destroy Animal Farm</em>"
