What did Daniel Levinson write? What did he postulate? In what ages does this happen? What happens in this?

a. "The Seasons of a Man's Life"; Life structure development; 30s-40s; Career consolidation
b. "The Psychology of Adolescence"; Adolescent identity development; 10s-20s; Identity exploration
c. "The Mature Mind"; Cognitive aging; 50s-60s; Decline in cognitive abilities
d. "The Emotional Life of the Toddler"; Emotional development in toddlers; 1s-3s; Emotional regulation