Final answer:
The Diathesis-Stress model suggests that a predisposition to depression interacts with environmental stressors to trigger the onset of the disorder.
Step-by-step explanation:
The subject of this question is the different models that explain the onset of depression. In addition to biological factors, there are numerous environmental and interpersonal events that contribute to the onset of depression. The correct answer is C. Diathesis-Stress model. This model suggests that there is a predisposition (diathesis) to developing depression, and that environmental stressors trigger the onset of the disorder. It takes into account both biological and environmental factors in understanding depression.