A person's willingness to stay in a relationship no matter what - to "stick it out" even in hard times" - is related to which component of love, according to Robert Sternberg?

The correct option is commitment.

Explanation:

Robert Sternberg's theory of love comprises of three triangular components:

Intimacy Passion Commitment

Commitment described a person's willing power to stick out and love the other person even in the worst of scenarios. These people realize that every relationship comprises of good and bad times and they are committed to stand for their relations even during the worst of times.

Sternberg, in his theory, explains how the three components are related to one another and the dependence of each component on the other.