Human emotions are complex psychological states that involve three distinct components: a subjective experience, a physiological response, and a behavioral or expressive response. Emotions can be triggered by various stimuli, such as events, thoughts, or interactions with others. Common emotions include happiness, sadness, anger, fear, and surprise. These emotions play a crucial role in human behavior and decision-making. They help individuals communicate their feelings and intentions, fostering social connections. Understanding emotions can enhance empathy and improve relationships, as recognizing the emotions of others is essential for effective communication and support in various situations.