Final answer:
Verbal facial expressions or body language, such as a nod of understanding, are called feedback.
Step-by-step explanation:
Verbal facial expressions or body language, such as a nod of understanding, are called feedback. Feedback refers to the nonverbal cues we use to signal understanding or agreement, such as nodding, smiling, or giving a thumbs up. These cues provide additional information to the speaker and can help improve communication and understanding.