The document discusses kinesics and para-linguistics as crucial components of non-verbal communication, defining kinesics as the study of body language, which includes facial expressions, gestures, body movements, postures, eye contact, and touch. It emphasizes how these elements convey emotions, attitudes, and interpersonal relationships, while para-linguistics pertains to vocal characteristics such as tone, pitch, and speed of delivery. The effective use of these non-verbal cues is essential for impactful communication.