Answer:
A nod of the head is a gesture in which the head is tilted in alternating up and down arcs along the sagittal plane. In many cultures, it is most commonly, but not universally, used to indicate agreement, acceptance, or acknowledgement.
Explanation:
The human head-nod is a vertical, up-and-down (or down-and-up) movement that is often used to show agreement or comprehension while listening. The flexed-forward, lowering motion of the skull is also used to emphasize an idea, an assertion, or a key speaking point.
