One's appearance is determined by the way one looks and the way one _______.

One's appearance encompasses not only the physical attributes one presents but also the way one behaves in social contexts. Behaving appropriately includes body language, posture, and mannerisms that contribute to the overall impression one makes on others. This aspect of behavior can greatly influence how people perceive you, often complementing or contradicting your physical appearance. While all the other options relate to personal expression or conduct, "behaves" specifically captures the essence of how one's general conduct and demeanor can shape perceptions of their appearance in interpersonal situations.