Final answer:
The correct option is c. romantic love.
Romantic love, as per Sternberg's triangular theory of love, is characterized by passion and intimacy without commitment. It's a type of love commonly found in the early stages of a romantic relationship.
Step-by-step explanation:
According to the triangular theory of love by Sternberg, the type of love defined by passion and intimacy but no commitment is known as romantic love. This form of love consists of deep affection and a physical attraction between individuals but does not necessarily include a long-term promise or a pledge to stay together. It is often the type of love experienced in the early stages of a romantic relationship, where two people feel a strong connection and desire for each other, yet may not be ready or willing to commit to each other fully.
Romantic love can be intense and exhilarating, reflecting a union that's both emotionally close and physically passionate. However, without the stabilizing effect of commitment, this love may be fleeting or may evolve into another form of love as the relationship develops.