I believe the answer is Adjective Clause because some signal words that give away that it could be an Adjective Clause is THAT, Which, Who, Whom, and Whose. And the word "That" is part of the underlined section, correct?
Different people in the story (hint: CHARACTERization
Catharsis<span> is the process of venting aggression as a way to release or get rid of emotions. Have you ever been so angry that you went outside and yelled or hit a pillow? Psychologists call this method catharsis. You may have heard someone say something was 'cathartic,' meaning it released emotion. For example, if you are angry you might hit something or scream, and that might make you feel better.</span>
