An ecological perspective of aging.
D000223:Adaptation, Psychological; D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D004463:Ecology; D005006:Ethnicity; D006801:Humans; D008875:Middle Aged; D012380:Role; D012922:Social Change; D013672:Technology; D014481:United States; D014937:Work