Final answer:
Lazarus uses the term primary appraisal to refer to the perception of an event as a threat or a challenge.
Step-by-step explanation:
Lazarus uses the term primary appraisal to refer to the perception of an event as a threat or a challenge. Primary appraisal involves judging the degree of potential harm or threat to well-being that a stressor might entail. It is the initial evaluation of a stressor and whether it is perceived as threatening or demanding.