Explaining why the best work of scientists is often produced in early adulthood while that of novelists often originates during middle adulthood requires a distinction between: a. initiative and generativity.
b. concrete and formal operations.
c. fluid and crystallized intelligence.
d. conventional and postconventional morality.

Fluid and crystallized intelligence.

Explanation:

Fluid intellect refers to the capacity to reason and to different groups. Crystallized wisdom refers to the synthesis of experience, information and skills that have been gained during life.

Crystallized knowledge is the capacity to use information that has already been learned by schooling and experience. Fluid intelligence decreases with age, whereas crystallized intelligence is retained or enhanced.

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