Non verbal communication includes all forms of conveying meaning without words,such as facial expressions,gestures and eye contact. Friendly eye contact signals attention,interest and warmth. In a classroom,this non verbal behaviour can encourage participation and trust. Therefore,the teacher is primarily using non verbal communication.
Option A:
Written communication relies on printed or typed words and does not involve direct eye contact as a code. Thus it cannot describe the behaviour in the stem.
Option B:
Mass communication involves reaching large audiences through media like TV or radio,not direct face to face eye contact in a single classroom.
Option C:
Mechanical communication would refer to use of machines or devices,rather than human eye behaviour.
Option D:
Non verbal cues like eye contact often reinforce verbal messages and help manage classroom climate,making option D the correct one.
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