Fear has both a biochemical and emotional response. Biochemically, when confronted with danger the body responds with increased heart rate, sweating, and adrenaline to either fight or flee. Emotionally, the response to fear is individual - some see it positively and seek thrills while others avoid fear. Phobias are persistent, excessive fears of objects or situations. The emotional response to fear can be reduced through repeated, gradual exposure which increases familiarity and is the basis of treatments like systematic desensitization. Overcoming fear involves recognizing hidden fears, challenging excuses, using imagination to reframe negative thoughts, and gradually exposing oneself to feared situations.