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The main purpose of the last paragraph of Passage 2 is to

A instill fear in the audience.

This answer choice is correct because the author wants to use fear to encourage their audience to believe that America needs more secure borders.
While this certainly contrasts Passage 1, there is no evidence that Passage 2 was written in response to Passage 1.
Similarly, the author is not providing a specific solution, but rather a vague suggestion.
Without a specific goal, the author is also not really calling the audience to action.