Faces express a wide range of emotions through various features, including the eyes, mouth, and eyebrows. These expressions can indicate feelings such as happiness, sadness, anger, surprise, and fear. For example, a smile often signifies joy, while a frown may indicate displeasure or concern. Facial expressions are universal and can be recognized across different cultures. They play a crucial role in nonverbal communication, helping people understand each other's emotions without the need for words. This ability to read faces is essential for social interactions and building relationships, as it fosters empathy and connection among individuals.