Final answer:
The conclusion of an argumentative essay must include a counterclaim to acknowledge and address opposing viewpoints.
Step-by-step explanation:
The conclusion of an argumentative essay must include a counterclaim to acknowledge and address opposing viewpoints. This helps to strengthen the overall argument by showing that the writer has considered different perspectives. Including a counterclaim demonstrates fairness and credibility, making the essay more persuasive.
Learn more about Concluding an argumentative essay