This term means anything that causes a stress response.

• A. Stressor
• B. Distress
• C. Eustress
• D. General Adaptation System

Answer: (A)

The main idea here is a term for anything that triggers the body's stress response. A stressor is any factor—external or internal—that prompts the body to react with stress. It can be a looming deadline, a loud noise, an argument, or even a scary thought. When a stressor is perceived, the body activates the stress response, releasing hormones like adrenaline and cortisol, which prepare you to deal with the demand. The other terms describe either the nature of the stress after it starts or how the body responds to stress over time: distress refers to negative, harmful stress; eustress is positive, motivating stress; and General Adaptation Syndrome is a model of the body's long-term response to stress through stages. Since the question asks for the trigger itself, stressor is the best answer.