Final answer:
Context is the important communication concept that refers to the situation, environment, or circumstance in which a message is communicated.
Step-by-step explanation:
The important communication concept that refers to the situation, environment, or circumstance in which a message is communicated is Context. Context is the setting of the rhetorical situation and it affects the ways in which a particular social, political, or economic situation influences the process of communication. It is important to consider the context when crafting a stance within a given situation for a particular purpose and audience.