All the following are examples of body language except:

Body language encompasses non-verbal communication cues that convey messages without the use of words. Examples typically include appearance, gestures, and facial expressions, all of which contribute significantly to how individuals communicate emotions, attitudes, and reactions.

Appearance involves how a person presents themselves, including clothing, grooming, and posture, which can signal self-esteem or professionalism. Gestures are movements of the hands or body that express ideas or emotions, such as waving or nodding. Facial expressions reveal feelings through changes in the face, such as smiling or frowning.

Tone of voice, while it plays a crucial role in verbal communication, does not fall under body language since it involves vocal elements rather than non-verbal cues. It is an aspect of how words are delivered, affecting the interpretation of verbal messages but not categorized as body language. Thus, tone of voice is the exception among the options provided.