Which term refers to contributing to or supporting a point in a discussion?

The term that best captures the idea of contributing to or supporting a point in a discussion is "contribute." This word specifically implies providing something—like an idea, piece of information, or perspective—that adds value to an ongoing dialogue or argument. In discussions, contributing involves actively engaging with the topic at hand, offering insights or evidence that bolster a specific viewpoint or enrich the overall conversation.

"Establish" tends to mean to set up or lay a foundation for something, which, while related, does not directly convey the aspect of adding support or participating in a discussion. "Advance" implies moving something forward, which could refer to developing a point but lacks the clear intent of providing support. "Highlight" suggests bringing attention to something already present, rather than actively contributing new elements to a discussion. Thus, "contribute" is the most appropriate term that aligns with supporting or enhancing a point in a conversation.