Final answer:
The stage of General Adaptation Syndrome characterized by symptoms like fatigue, weakness, and soreness is the stage of exhaustion.
Step-by-step explanation:
The stage of the General Adaptation Syndrome characterized by fatigue, weakness, and soreness is the stage of exhaustion. After prolonged exposure to a stressor, the body enters this stage when it no longer can adapt to the stress. This stage involves the depletion of the body's ability to resist, leading to symptoms such as severe fatigue, depression, a suppressed immune response, or more dire consequences like irreversible organ damage or even death. It is the final phase in the three-stage model of the body's physiological reaction to stress, which also includes the alarm reaction and the stage of resistance.