Identifying Types of Motivation

Consider the following scenario: A student has been working diligently toward achieving a merit scholarship for college, driven by both personal ambition and the desire to support his family financially. However, as the semester progresses, he finds that his study habits are crumbling under stress, and he begins to doubt whether his efforts will pay off. While contemplating this, he reminds himself of the potential rewards of achieving his goal. In the context of motivation, which of the following factors is illustrated by the student's reliance on the potential reward as a source of motivation?