Regarding the interaction of heredity and environment in child development, based on a deep analysis of Robert Plomin's Behavioral Genetics and the theories of 'Shared vs. Nonshared Environment', which of the following statements most authentically explains the conclusions of studies conducted on twins and adopted children?

The relative role of heredity and environment in child development is studied under behavioral genetics. Research by Robert Plomin makes it clear that 'Nonshared Environment' is far more effective than 'Shared Environment' in determining individual differences in children's personality, intelligence, and psychological traits, because even children raised in the same family have unique experiences and different peer circles.