Multi channel communication uses more than one channel or mode simultaneously,such as verbal and visual. In the stem,the teacher employs speech,slides and videos,engaging multiple senses. This combination provides several channels through which the message reaches learners. Therefore multi channel is the appropriate term.
Option A:
Linear communication emphasises one directional flow and does not refer to the number of channels used.
Option B:
Multi channel communication often enhances understanding and retention by reinforcing ideas through different modes,making this option correct.
Option C:
Intrapersonal communication is internal and unrelated to the use of slides or videos.
Option D:
One way communication refers to lack of feedback,not to the richness of channels.
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