What are four ways that the speaker can use the channels of communication to communicate effectively with the audience?

What will be an ideal response?

There are seven ways. The student may choose four of the seven. (1) Signal your relationship with the audience through proxemics; (2) Adapt the physical setting to the speaker's communicative needs; (3) Adapt the gestures and movements to the size of the audience; (4) establish eye contact with the audience, looking specific individuals in the eye; (5) Use your body to communicate your feelings; (6) Regulate the pace of your presentations with bodily movement; (7) Use your full repertoire of gestures.