Showing one's emotions is an important part of communication. Reacting, reddening, and reaching are all ways to show one's emotions. Reacting is a response to a stimulus, such as a facial expression or a gesture. Reddening is the act of blushing, which is a physical sign of embarrassment or shyness. Reaching is the act of extending one's arms or hands to express emotion, such as when someone reaches out to hug another person. All three of these actions can be used to show one's emotions.