Aperson who reacts strongly to a stressor but returns to baseline functioning quickly is said to have

Homeostatic resilience

Explanation:

Resilience refers to the ability to cope with a crisis or to return to the state you were in before the crisis quickly. When a person has homeostatic resilience, they tend to react strongly during a crisis, but are able to return to baseline functioning (pre-crisis state) quickly. People who are resilient are able to better protect themselves from the potential negative effects of stressors. They are also able to better avoid long-term negative consequences after an incident.

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