Final answer:
The James-Lange Theory best describes this situation.
Step-by-step explanation:
The best theory of emotion that describes the given situation is the James-Lange Theory.
The James-Lange Theory proposes that emotions arise from physiological arousal. According to this theory, your emotional experience is a result of the physiological changes that occur in your body. For example, if you encounter a venomous snake on your doorstep, your heart racing and stomach churning would be the physiological changes associated with fear, and you would experience fear as a result.
The James-Lange Theory suggests that physiological arousal precedes the emotional experience. It argues that different emotions arise from different patterns of physiological arousal. In the given situation, the physiological response of an increased heart rate and churning stomach aligns with the fear response. Therefore, the James-Lange Theory best describes this situation.