How is "countenance" best described?

"Countenance" is best described as a facial expression. The term refers to a person's appearance or expression, particularly regarding their face. It can convey a wide range of emotions, such as happiness, sadness, surprise, or anger, and is often used to assess someone's feelings or state of mind based on how they look. In contrast, the other options involve different forms of communication: physical movement pertains to body language, written documents relate to text-based communication, and verbal communication focuses on spoken words. Therefore, the definition of "countenance" aligns specifically with the concept of facial expression.