Non-verbal communication includes all message elements that are not expressed in words, such as gestures, facial expressions, posture, eye contact and tone of voice. In the classroom, these cues can reinforce, contradict or modify verbal messages. The stem lists gestures, facial expressions and posture, which clearly belong to non-verbal communication.
Option A:
Written communication involves messages conveyed through written symbols, such as notices, emails or board work. While important in teaching, it is not what the stem is referring to.
Option B:
Non-verbal cues can convey enthusiasm, interest, approval or disapproval even when the teacher is silent. They are integral to classroom climate and student perception. Because the question focuses on gestures and posture, non-verbal is the correct answer.
Option C:
Grapevine communication refers to informal, unofficial channels of communication within organisations, such as rumours, and has little to do with body language.
Option D:
Formal communication refers to official, structured channels such as circulars or administrative memos, not specifically to gestures and expressions.
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