Part B (Q5): Elaborate on the determinants of development.

Human development is not the result of a single cause, but rather the complex interplay of various determining factors. These determinants are broadly categorized into Biological (Nature) and Environmental (Nurture) factors.

1. Biological Determinants (Heredity / Nature)

These are the genetic and physiological factors present at birth.

• Genetics: The DNA inherited from parents sets the blueprint for development. It determines physical traits (eye color, height limits) and genetic predispositions to certain diseases (e.g., Down syndrome, propensity for schizophrenia).
• Nervous System and Brain Structure: The physical development of the brain dictates cognitive capacities, motor skills, and emotional regulation.
• Hormonal (Endocrine) System: Hormones regulate growth, metabolism, and sexual maturation (puberty), profoundly affecting physical and psychological development.

2. Environmental Determinants (Nurture)

These are the external conditions and influences that affect the individual from conception onward.

• Prenatal Environment: The mother's health, nutrition, stress levels, and exposure to teratogens (drugs, alcohol, radiation) during pregnancy directly impact fetal development.
• Family and Upbringing: The primary agent of socialization. Parenting styles (authoritarian vs. authoritative), emotional support, and the socioeconomic status of the family drastically shape cognitive and emotional development.
• Nutrition and Health: Adequate nutrition in early childhood is critical. Malnutrition can cause irreversible stunting of physical and cognitive growth.
• Socio-Cultural Factors: Culture dictates norms, values, and gender roles. It determines what behaviors are encouraged or suppressed. For example, a society that heavily values academic achievement will push cognitive development in that specific direction.
• Peer Groups and Schooling: As children grow, their peers and the quality of formal education become massive determinants of their social skills, self-esteem, and intellectual capability.

The Interactionist Perspective: Modern psychology emphasizes that these determinants do not act in isolation. The environment determines how, or even if, genetic potentials are expressed (Epigenetics).