Final answer:
A high reaction threshold for the fight/flight response indicates needing a greater perception of threat to initiate this response. The correct option is c. requiring a greater perception of threat to trigger the fight/flight reaction in a specific circumstance
Step-by-step explanation:
A high reaction threshold in terms of the fight/flight reaction describes requiring a greater perception of threat to trigger the fight/flight reaction in a specific circumstance. This physiological change allows the body access to energy reserves and heightened sensory capacity so that it can fight off a threat or run away to safety.
The fight-or-flight response is an involuntary human body response mediated by the nervous and endocrine systems that prepares the body to fight or flee from perceived danger. In the modern world, this often occurs in response to psychological stressors rather than physical threats.