Final answer:
The fight-or-flight response is a physiological reaction managed by the sympathetic nervous system and is correctly termed as 'stress reactivity'.
Step-by-step explanation:
The fight-or-flight response is a physiological reaction of the body in response to a perceived harmful event or threat to survival. It is more accurately referred to as the "fight, flight, freeze or fawn response" and encompasses a variety of physiological processes orchestrated by the sympathetic nervous system.
Among the changes are an increase in heart rate and a boost in energy levels through raised blood glucose. This prepares the body for urgent physical activity. The correct answer to the question 'The fight-or-flight response is termed' is B. stress reactivity.