Final answer:
Appearing passive but indirectly acting out anger is an example of passive-aggressive communication. This type of behavior contrasts with assertive, aggressive, and passive communication styles.
Step-by-step explanation:
Appearing passive on the surface but acting out anger in a subtle, indirect, or behind-the-scenes way is an example of passive-aggressive communication. Passive-aggressive behavior is a way to express negative feelings or emotions indirectly instead of openly addressing them. Individuals may employ this type of communication when they feel unable to express their anger directly due to social, professional, or personal constraints. This approach contrasts with assertive communication, where a person clearly and respectfully expresses their needs or concerns. On the other hand, aggressive communication involves directly expressing one's feelings or demands in a forceful or hostile manner, and passive communication is characterized by avoidance of confrontation and failure to express one's own needs or desires.