Emotions exert an incredibly powerful force on human behavior. Strong emotions can cause you to take actions you might not normally perform or to avoid situations you enjoy. Why exactly do we have emotions? What causes us to have these feelings? Researchers, philosophers, and psychologists have proposed different theories to explain the how and why behind human emotions.
Emotion is a complex, subjective experience accompanied by biological and behavioral changes. Emotion involves feeling, thinking, activation of the nervous system, physiological changes, and behavioral changes such as facial expressions.