Final answer:
Depression and threats to self-esteem are categorized as psychological stressors, which are part of how individuals perceive and respond to events seen as threats to their well-being.
Step-by-step explanation:
Depression and threats to self-esteem are examples of psychological stressors. These stressors are part of the broader processes involving an individual's perception and appraisal of events that are seen as threatening to their well-being. Factors such as depression can involve a threat to one's self-image or self-worth, which are inherently psychological in nature. Stress can arise from various sources, including chronic and acute stressors, with psychological factors significantly impacting a person's reaction to and experience of stress.