Heredity and environment interact in development because :
Environment shapes genetic potential
Heredity sets the range or potential of a trait a child can develop, while the environment determines the extent to which that inherited potential is actually expressed and realized.
For instance, a child may inherit the genetic potential for a certain height or intelligence level, but adequate nutrition, stimulation, and experiences in the environment determine how much of that potential is actually achieved.
Media controlling personality, school replacing heredity, and genes working independently all describe one factor acting alone or an unrelated influence, not the mutual interaction between heredity and environment.
Hence, heredity and environment interact in development because environment shapes genetic potential.
Balanced development in adolescence depends on interaction between :