Final answer:
The triangular theory of love deems the first scenario as 'Infatuation', the second as 'Companionate', and the third as 'Empty' love. The correct option is a. Infatuation; Companionate; Empty.
Step-by-step explanation:
According to Robert Sternberg's triangular theory of love, the relationship scenarios provided match the following poles: Infatuation, Companionate, and Empty love. 'She has a crush from afar on that handsome professor' represents Infatuation, which involves passion without intimacy or commitment. 'He is your best friend, but the spark isn't there' aligns with Companionate love, which includes intimacy and commitment, but lacks passion. 'She and her husband live totally separate lives, but they would never get a divorce' encapsulates Empty love, marked by commitment without passion or intimacy.
According to Sternberg's Triangular Theory of Love, there are three components of love: intimacy, passion, and commitment. Each scenario represents a different combination of these components. Infatuation represents passion without intimacy or commitment, companionate represents intimacy and commitment without passion, and empty love represents commitment without intimacy or passion.