Which term describes the response to an argument from an opposing debater?

The term that describes the response to an argument from an opposing debater is "rebuttal." In a debate, a rebuttal is a crucial part of the discourse, where the debater addresses and counters the points made by the opponent. This involves presenting evidence, reasoning, or new perspectives that challenge the claims or arguments put forth by the other side. The purpose of a rebuttal is not only to undermine the opposing argument but also to strengthen one’s own position by demonstrating critical engagement with the opposing side.

In contrast, cross-examination typically refers to the process of questioning an opponent’s claims or evidence rather than directly presenting counterarguments. Affirmation may refer to supporting one’s own stance or claims rather than responding to the opposing argument. Summation involves reiterating key points made during the debate rather than specifically addressing the other debater's arguments. Thus, the rebuttal serves a distinct and essential role in public debate, making it the correct choice in this context.