General adaptation syndrome has how many steps

Hans Selye described three predictable stages the body uses to respond to stressors, called general adaptation syndrome (GAS). The first stage is the alarm stage, which provides a burst of energy. In the second stage, known as the resistance stage, the body attempts to resist or adapt to the stressor. The last stage is known as the exhaustion stage because energy is depleted.

Magnesium! this is found if caves usually