The reaction to external stressors is called:

Strain

The correct answer is Option (2) → Strain

The word stress has its origin in the Latin words ‘strictus’, meaning tight or narrow and ‘stringere’, the verb meaning to tighten. These root words reflect the internal feelings of tightness and constriction of the muscles and breathing reported by many people under stress. Stress is often explained in terms of characteristics of the environment that are disruptive to the individual. Stressors are events that cause our body to give the stress response. Such events include noise, crowding, a bad relationship, or the daily commuting to school or office. The reaction to external stressors is called ‘strain’.