Final answer:
Jennifer is facing physiological consequences of stress, manifesting as depression and sleep issues, which can affect overall health.
Step-by-step explanation:
Jennifer, the wedding planner experiencing stress and its effects such as depression and difficulty falling asleep, is dealing with physiological consequences of stress. Stress can lead to a variety of health issues including psychological disorders, cardiovascular problems, and a weakened immune system. These responses often occur in reaction to environmental demands and can manifest in different ways such as cognitive, behavioral, and physiological symptoms.