Individual differences in development of children can be attributed to

The correct option is interplay of heredity and environment.

Explanation:

Individual differences in the development of children are shaped by both genetic factors and environmental experiences.

1. Heredity (Nature): Heredity provides the genetic blueprint or potential for a child's development, influencing physical traits, temperament, and biological predispositions.

2. Environment (Nurture): Environment includes all external influences such as family background, education, culture, socioeconomic status, and social relationships that help realize or shape this genetic potential.

Conclusion: Child development is not determined exclusively by heredity or environment alone; rather, it is a complex and dynamic interplay of heredity and environment.