The final stage of general adaptation theory is known as

Exhaustion stage of general adaptation.

Explanation:

The final stage of general adaptation theory is known as exhaustion stage.

The general adaptation is has been divided into three stages - Alarm stage, resistance stage and exhaustion stage.

The theory of adaptation describes the physiological changes that an organism undergoes when it is exposed to stress.

The first stage, which is the alarm stage which is characterized by the burst of energy and the stressor acts as a stimulus.

The second stage is the resistance stage when the organism develops the resistance against stressor.

The last stage is the exhaustion stage when the energy is sufficiently depleted and the final adjustment is attained.