[Solved] Only one type of relationship can be represented in an Entity-Relationship Model. Cynical Beliefs: A perspective characterized by skepticism of the motives or ethics of others. Anxious/Ambivalent: Refers to a type of attachment characterized by worry, uncertainty, and emotional fluctuations in relationships. Reiss's Wheel: A theory by Ira Reiss that outlines a circular process of four stages in developing and sustaining intimate relationships, including rapport, self-revelation, mutual dependency, and personality need fulfillment. Sexual Activities: Behaviors involving sexual organs that are intended to produce erotic pleasure and/or reproductive outcomes.