Final answer:
Romantic love is most emphasized as the basis for marriage in the United States and involves passion and intimacy. According to the triangular theory of love, romantic or passionate love includes passion and intimacy but lacks commitment.
Step-by-step explanation:
The type of love most emphasized as the basis for marriage in the United States is romantic love. This form of love combines elements of passion and intimacy, often seen as the spark or chemistry between two people, with a focus on emotional connection and a desire to maintain a close, personal relationship. However, in the context of the triangular theory of love, a type of love defined by both passion and intimacy but without commitment is referred to as romantic or passionate love. It is characterized by a strong physical and emotional attraction but lacks the element of commitment that would qualify it as consummate or complete love, which encompasses all three components of the theory—intimacy, passion, and commitment.