Adrenalin is considered as a hormone for “fright and flight” because it

Adrenalin is considered as a hormone for "fight or flight" because it prepares the body for action. Adrenalin is produced by the adrenal glands and is released into the bloodstream in response to stress or danger. When the body senses danger or a stressful situation, adrenalin triggers a series of physiological responses that help the body cope with the situation. These responses include increasing heart rate, increasing blood pressure, and releasing glucose into the bloodstream for energy. This allows the body to respond quickly and effectively to the situation, either by fighting or by running away (flight). So, adrenalin plays a key role in the "fight or flight" response to stress or danger.