The correct answer is Non-verbal Communication.

• Proxemics is the study of personal space and the degree of separation that individuals maintain between each other in social situations. Each species has its own rules relating to the personal territory.
• It is a theory of non-verbal communication that explains how people perceive and use space to achieve communication goals.
• Neutral Communication
  • It means ensuring that what we are saying is not being misinterpreted.
  • Having a neutral communication style means using written or spoken language to communicate with people in clear, precise terms.
  • This comes back to self-awareness, which is the key to being aware of others and being able to empathise with them.
• Unidirectional Communication
  • It is a one-sided conversation where the social engineer communicates with the target, but the target has no means to communicate back with the social engineer.
  • This is normally done through some communication medium such as bulk e-mails or short message service.
• Verbal Communication
  • It is defined as communication to express our views, information, and ideas in the form of sound and words.
  • It is a type of oral communication wherein the message is transmitted through spoken words.
• Non-verbal Communication
  • It is the transmission of messages or signals through a nonverbal platform such as eye contact, facial expressions, gestures, posture, and the distance between two individuals.
  • It includes facial expressions, the tone and pitch of the voice, gestures displayed through body language (kinesics) and the physical distance between the communicators (proxemics).