Exigence
A stimulant that leads to a writer constructing their work. The writer is in charge of conducting the reason for the text existing when they determine exigence.
Medium
The tool that the writer uses to deliver their writing. Your choice of delivery will be heavily impacted by your audience and purpose, so those two must be heavily considered.
Stance
Insight on your objective, audience, and theme, and mastering these supports a writer with producing as rhetorical stance.