Answer:
Persuasion
Step-by-step explanation:
Persuasion is the influence that causes people to change their minds about a particular issue or topic. The form by which persuasion is used generally is audio with visual cues.
A person can talk without showing any emotions, but a person showing emotions through the use of gestures, voice modulation etc., is more effective in persuading a person.
Hence, the question here refers to persuasion.