Answer:
Alarm
Step-by-step explanation:
The "fight-or-flight" response happens on the first stage of stress, the Alarm Stage or Alarm Reaction Stage. It is at this stage that the body perceives the stressor, thus, it prepares to either face it/fight it or flee from it. For example, when a person's bag is snatched by a thief, he could either follow the thief to get his bag or stay away from trouble by just shouting to alarm the passersby. Following the thief is considered a fight response while staying away from trouble is the flight response.
The person in this stage experiences rapid heart beat, rapid breathing, trembling, dilated pupils, pale or flushed skin and so on.