How does fear help us survive?

Fear serves as a crucial survival mechanism by triggering the body's fight-or-flight response, preparing us to react swiftly to potential threats. This heightened state of alertness enhances our awareness of danger, allowing us to make quick decisions that can protect us from harm. Additionally, fear can encourage caution and avoidance of risky situations, ultimately helping us to navigate our environment safely. In this way, fear plays an essential role in both individual and species survival.