What best describes the fight-or-flight response?

The fight-or-flight response refers to a physiological reaction that occurs in response to a perceived threat or danger. This response prepares the body to either confront or flee from the threat, leading to a heightened state of alertness and readiness. This state is characterized by various physiological changes, including increased heart rate, elevated blood pressure, and the release of stress hormones like adrenaline and cortisol, all of which prime the body for quick action.

Being in a state of readiness means that the body is mobilized to respond effectively to stressors, whether by fighting or fleeing. This response is critical for survival, helping individuals react swiftly to dangerous situations. The other choices do not align with this biological response; emotional calmness, confusion, and relaxation do not involve the same level of alertness and physiological readiness required during a fight-or-flight situation.