Answer:
Option a: Generativity
Explanation:
George Vaillant is widely known for the "Grant Study," experiment that involved Harvard University men in their early 30s and their late 40s who had initially been interviewed as undergraduates.
He carried out a longitudinal studies of adult development and aging and it was done on three groups/categories of people who are Middle-SES, intellectually gifts women born about 1910, Socially advantaged Harvard graduates born about 1920 and Socially disadvantaged inner-city men born about 1930.
Parenting, teaching, and involvement in the community are said to be good examples of how middle-aged adults can develop generativity.
According to Erikson, generaviity simply means when middle adulthood and covers adults' desire to leave behind legacies of themselves.
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Round is to ball as square is to box
