Final answer:
Angela's hunger-driven focus on eating mozzarella sticks by sixth period can be explained by the Drive Reduction Theory of motivation, which relates to satisfying physiological needs to achieve homeostasis.
Step-by-step explanation:
The theory of motivation that best explains Angela's behavior is likely one related to physiological needs, such as the Drive Reduction Theory of motivation.
This theory posits that humans are motivated to satisfy physiological needs, like hunger, to maintain homeostasis. When Angela's stomach is empty, it contracts and sends signals to her brain, triggering hunger pangs.
These biological cues become more insistent by sixth period, making it difficult for her to concentrate on anything other than eating. Angela's powerful craving for mozzarella sticks is a clear example of how physiological mechanisms drive our behavior to fulfill basic needs.