Which term means to support a specific position in an argument?

To support a specific position in an argument is best captured by the term that means to defend that position or viewpoint. When someone defends an argument, they provide reasons, evidence, and rationale to uphold their stance against counterarguments or opposing views. This process involves articulating why their perspective is valid and worthy of consideration, often addressing possible objections to strengthen their claim.

In contrast, assessing involves evaluating the quality or effectiveness of something, interpreting implies explaining the meaning or significance of something, and summarizing entails presenting a concise version of the main points without necessarily providing support for a specific argument. Thus, the term that accurately encapsulates the act of supporting an argument is "defend."