Tracy is going on a hike in the woods to observe nature for her biology class. On her hike, she sees a snake then, her rate increases and she runs away at the same time. Which theory of emotion applies to this situation and why?

This is the cognitive appraisal theory of emotion, which is often referred to as "fight or flight". Tracy became frightened when she saw the snake, and ran to increase her own safety. She drew the conclusion in her mind that the snake was dangerous, so she ran. The snake did not hiss or do anything that could be perceived as threatening, Tracy became scared on her own