Final answer:
According to Barbara Fredrickson, both positive and negative emotions are associated with actions that helped our ancestors save their lives.
Step-by-step explanation:
According to Barbara Fredrickson, both positive and negative emotions are associated with actions that helped our ancestors save their lives. For example, feeling fear in response to a threat triggers the fight or flight response, which can help ensure survival. On the other hand, feeling happiness or excitement can motivate behaviors that lead to positive outcomes and increase chances of survival.