‘Proxemics’ is related to

Proxemics is the study of how people use physical space and distance while communicating. Edward T. Hall introduced the term in 1963. It sits under non-verbal communication, alongside kinesics (body movement), haptics (touch), paralanguage (tone and pitch) and chronemics (use of time). So the answer is D.

Why the others fail:

• A) Neutral communication is not a recognised category in communication theory. It is a distractor with no standard meaning.
• B) Unidirectional communication describes a one-way flow of message, such as a broadcast or a notice with no feedback. Distance has nothing to do with that idea.
• C) Verbal communication is communication through words, spoken or written. Proxemics deals with the gap between speakers, not the words they use, so it falls outside this category.

Hall's four zones (intimate, personal, social and public) show how cultural norms shape comfort with distance. This links to Mains GS-IV on ethics and interpersonal communication, and to the role of body language in citizen interaction by public officials.

Trap: aspirants pick verbal communication because they associate proxemics with speaking. Remember that the field studies silent signals such as distance and space, and that places it under non-verbal communication.