Caroline is called on to speak in front of her Child Development class. She has gained confidence and competence in her public speaking class, a term that your text calls

intimacy, passion and commitment are the components of a interpersonal relationship emphasized in the triangular theory of love by robert sternberg.

the triangular theory of love says love can be comprehend as this componest form the vertices of a triangle.  

intimacy relates to feelings such as of closeness and connection;

passion relates the drives that brings people together, as physical attraction.

commitment relates to the being in a long-term relationship.

is there a year set? the question is incomplete

answer; lorenz;

answer; ethnocentrism;