The concept of having shared understanding in public speaking is most closely related to common ground.
Common ground (also known as co-orientation) is an aspect of credibility to which the speaker's values, beliefs, and interests are shared with the audience.
The concept of having shared understanding in public speaking is most closely related to the dimension of Common ground of source credibility.
Answer: Option 2
Explanation:
It is conventionally true that in public speaking, for the speaker to make his message understandable to the audience, should derive the information from a source that is common to both the speaker and the audience.
The information, or the topic of the speakers address should serve as a common ground between the audience and the speaker.
