A classification of body movements is called

A classification of body movements is called kinesics, the study of gesture, posture and facial motion as meaning.

It systematically groups the bodily signals that accompany or replace speech.

Emblems name one specific type of gesture with a direct verbal translation, not the whole classification.

Calling it non-verbal signs is too broad, covering every wordless cue rather than the study of body movement.

Displays refer to facial expressions of emotion, a subset rather than the general classification.

Ray Birdwhistell introduced kinesics as the study of body language.