The correct answer is 6:subtituting for.
In this case you are Substituting the verbal communication for a non-verbal one.
Substituting is the replacement of words with non-verbal language. For example, Sometimes the raising of an eyebrows speaks volumes; or A mime or talkie (silent) film illustrates how an experience, activity or emotion can be conveyed without words. People learn to associate facial expressions, body movements, and body positioning with specific feelings and intentions.