Final answer:
The Schachter-Singer two-factor theory of emotion supports the explanation that the physiological arousal combined with cognitive appraisal leads to the experience of emotion in the given scenario. Option b
Step-by-step explanation:
The theory of emotion that would support the explanation that your heart begins beating fast due to interpreting environmental cues as the cause of your arousal is the Schachter-Singer two-factor theory.
This theory suggests that physiological arousal does not directly lead to the emotional experience. Instead, it needs to be interpreted in context. The labeled arousal combined with the cognitive appraisal of the situation produces the emotional experience.
In contrast, the James-Lange theory of emotion suggests that physiological arousal is the direct cause of the emotional experience, without a cognitive appraisal. However, the question description fits better with the Schachter-Singer theory. Option b