Concept:Individual differences among people arise primarily from the combined influence of heredity (genetic inheritance) and environment (surroundings and experiences). These two factors interact continuously to shape each person's unique traits.
Explanation:1.
Heredity: Each person inherits a unique set of genes from their parents. No two individuals (except identical twins) have the exact same gene combination. This genetic diversity causes variations in physical features, intelligence, personality, and other traits.
2.
Environment: After conception, the individual is influenced by prenatal conditions, family background, socio-economic status, cultural norms, education, peer interactions, and life experiences. Even within the same family, the environment affects each child differently.
3. The constant interplay of heredity and environment creates endless individual differences. Factors like age, sex, occupation, and qualification are either results or secondary influences, not the primary causes.
Answer:The primary causes are environment and heredity. Therefore, the correct option is
C (Environment and heredity).