Final answer:
Laurie's marriage, with its mutual affection and shared responsibilities, is an example of Companionate Love, which is distinct from Consummate Love, Romantic Love, and Passionate Love.
Step-by-step explanation:
Laurie's appreciation of mutual affection, shared decision-making, and household responsibilities in her 20-year marriage with Jim exemplifies Companionate Love. According to Robert Sternberg's triangular theory of love, Companionate Love is characterized by intimacy and commitment, but lacks passion. It's found typically in long-term relationships where the initial passion has settled into a deep, affectionate attachment—the kind of love that binds people together as they share their lives more deeply.
In contrast, Consummate Love is the complete form of love, consisting of intimacy, passion, and commitment, and is considered the ideal relationship type. Romantic Love is marked by passion and intimacy but is lacking in commitment, while Passionate Love is full of ardor and desire, but may not be characterized by lasting intimacy or long-term commitment.