Hi !!
<em>The sentence which has a pronoun-antecedent agreement error is </em>► <u> SENTENCE 2</u>
It was common for an enslaved person to stop there on <u><em>their</em></u> way to the North.
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<em>It should be ►</em>
It was common for an enslaved person to stop there on <em><u>his</u></em> way to the North.
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☺☺☺
The correct answer would be, A word, phrase, or clausethat seems to refer to or modify an unintended word because of its placement in a sentence.
I think this is definitely WHO because the story is talking about a certain unknown character.
Answer:
This is not a question but ok.
Explanation: