Stress is a broad and complex phenomenon characterized by environmental demands, internal psychological processes, and physical outcomes. The study of stress is multifaceted and commonly divided into three theoretical perspectives: social, psychological, and biological. The social stress perspective emphasizes how stressful life experiences are embedded into social structures and hierarchies. The psychological stress perspective highlights internal processes that occur during stressful situations, such as individual appraisals of the threat and harm of the stressors and of the ways of coping with such stressors. Finally, the biological stress perspective focuses on the acute and long-term physiological changes that result from stressors and their associated psychological appraisals. Stress and coping are inherently intertwined with adult development.