4) Contemporary developmentalists now grant roles to both the influence of nature and nurture on development, but believe the relative contribution of each influence can vary. To understand the relationship between nature and nurture, scientists have proposed various ways to understand how nature and nurture work together. Concepts that have been proposed include Gene- Environment Interaction, Gene-Environment Correlation, and Epigenesis. Briefly describe each concept, making clear which one you believe explains the relationship between nature and nurture best.