Question

Affinity, immediacy, respect, and control are dimensions of what kind of communication?

Answer 1

Affinity is the degree to which people like or appreciate one another.
Immediacy is the degree of interest and attention that people feel toward and communicate to others.
Control is the degree to which the parties in a relationship have the power to influence one another. 
Affinity, immediacy, respect, and control are dimensions of relational communication, which is  interpersonal communication and refers to the personal relationships.