What is role of body language in making presentation?

First body language is natural and a part of communication.You cannot afford to stand still while Wording a speech,some relevant movements must occur such as maintaining the eye contact,moving your hands and also using facial expressions.

Next is that it is used in most cases to vent out nervousness.By moving around you get accustomed to the fact that a lot of people are waiting to learn from you.

Also used to emphasize a point.This can be through the use of hands and gestures.

Used to clarify points.Since you as the speaker wants to get the audience to understand you,one is needed to use gestures and also facial expressions to make a point become well understood.

Finally is that body language is used to attract attention,Through the use of eye contact,movements,gestures and also facial expressions the speaker is able to make the audience listen to him and not be drawn away by any distractions.