Fear is an emotional response induced by a perceived threat which causes changes in brain function and behavior such as fleeing, hiding, or freezing from traumatic events.
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Fight or Flight Response: The body's response to perceived threat or danger, involving physiological changes such as increased heart rate and adrenaline.
Phobia: An extreme, irrational fear of a specific object, situation, or activity.
Anxiety: A feeling of worry, nervousness, or unease about something with an uncertain outcome.