Question

having a counterclaim in an argumentative essay allows the author of the essay to
provide background information on the topic.
support his or her claim with evidence.
state his or her opinion on the topic.
address any opposition to his or her claim.

Explanation:

A counterclaim in an argumentative essay refers to acknowledging and engaging with opposing viewpoints. The other options describe different essay components: background info sets context, evidence supports the main claim, and stating an opinion is the core claim itself. Only addressing opposition matches the purpose of a counterclaim.

Answer:

address any opposition to his or her claim.