What is means used a movement of the head or body to convey meaning?

The movement of the head or body to convey meaning is known as "body language" or "nonverbal communication." It includes gestures, postures, and facial expressions that can express emotions, attitudes, or reactions without the use of Words. For example, nodding can indicate agreement, while crossed arms may suggest defensiveness. Understanding these movements enhances interpersonal communication and helps convey messages more effectively.