Which type of nonverbal communication includes body motion and gestures?

The answer identifies "body motion" as the type of nonverbal communication that encompasses the various physical movements and gestures made during interaction. Body motion is a broad category that includes a wide range of physical expressions, such as posture, facial expressions, and gestures. These movements can convey a multitude of emotions and intentions and are an integral part of how humans communicate nonverbally.

While "emblems" refer specifically to gestures that have a direct verbal translation (such as a thumbs-up), "regulators" involve movements that help manage the flow of conversation, like nodding to indicate understanding or signaling someone to continue speaking. "Chronemics" pertains to the use of time in communication, influencing how messages are perceived based on timing and pacing.

Thus, body motion serves as an umbrella term for these various forms of nonverbal communication, making it the most accurate choice in this context.