Convert to rectangular coordinates. Use exact values. 
Definitions:
Psychosocial Development
Erik Erikson's theory that human development consists of eight stages from infancy to adulthood, with each stage presenting a unique challenge that impacts the individual's personality and social relationships.
Heredity
The passing of traits from parents to offspring through genes, influencing characteristics such as appearance, behavior, and disease predisposition.
Longitudinal Study
Research that follows the same subjects over a period of time, observing changes or development in those subjects.
Development
The process of change or growth that occurs in organisms over time, often referring to physical, cognitive, or emotional maturation.
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