Step 1: Define GAS.
General Adaptation Syndrome (GAS) is a model that describes the body's short-term and long-term reactions to stress.
Step 2: Identify the proposer.
GAS was proposed by Hans Selye, a Canadian endocrinologist, in 1936. He developed the theory to describe how the body responds to stress through a series of physiological changes.
Step 3: Clarify the significance.
Selye’s work highlighted the body's adaptive responses to stressors, marking a significant contribution to understanding stress and its impact on health.