Answer:
media richness theory
Step-by-step explanation:
Media richness theory is the one that focuses on classifying each medium according to complexity if the messages it handles efficiently.
It cannot be social penetration theory because this one teaches you that as relationships grow, so does the interpersonal communication between the people involved.
It cannot be social presence theory because this theory suggests that text-based messages deprive users of the personal feeling associated with face-to-face interactions.
It cannot be social cues theory because this one uses hostile language online that creates a negative climate for relational interaction.