D.) Extroversion. Individuals who exhibit high levels of activity and find stimulation in social events are classified as extroverts—one of the five major personality traits. This trait is evident through characteristics such as assertiveness, excessive chatting, sociability, and high energy levels. Liz, as described, is an outgoing and lively person, evidenced by her habit of hosting friends on weekends and participating in social events. She gains her energy from interactions with others, illustrating the extroversion trait.