Final answer:
A transaction under the Stress and Coping Model is the dynamic interaction between an individual and their environment as they appraise stressors and deploy coping strategies to manage stress.
Step-by-step explanation:
The correct definition of a transaction under the Stress and Coping Model is D: The interaction between the person and the environment.
Transactions represent the dynamic interplay between individuals and their external circumstances. When confronting stressors, individuals engage in a continuous process of appraisal and coping. Primary appraisal is assessing the potential threat posed by an event, while secondary appraisal involves evaluating one's resources to cope with the stressor. Coping strategies fall into two categories: problem-focused coping, where individuals directly address the issue causing stress; and emotion-focused coping, where the goal is to alleviate the emotional distress associated with the stressor.
Stress is perceived differently by each individual, which means that coping mechanisms for managing stress are also highly personalized. The transactional aspect highlights the constant negotiation and adaptation as one deals with stress, with the coping style utilized significantly affecting one's psychological and physical well-being.