Final answer:
The final stage of symptoms of trauma is the stage of exhaustion, leading to serious health issues due to the body's depleted ability to cope with stress.
Step-by-step explanation:
The final stage of symptoms of trauma refers to the stage of exhaustion as per Selye's general adaptation syndrome, which includes the culmination of all previous stages’ signs and an individual's decreased ability to cope with stress. At this point, the body's adaptive energy is depleted, potentially leading to serious health consequences such as chronic fatigue, severe physiological damage, or even death. Prolonged exposure to stress without adequate resolution can result in a variety of systemic symptoms, including illness and disease, as illustrated in cases like long-term parental stress over a missing child.