Professor Lee believes that research into conceptual development in children should emphasize how children's concepts reflect the interaction between their specific experiences and their biological predispositions to process information in particular ways. Which theme fits with Professor Lee's view?

Developmental psychology is the scientific study of how and why human beings change over the course of their life. Developmental psychology currently focuses in the entire human being lifespan.

Developmental psychology examines our physical, cognitive, and social development and it focuses on three major issues:

Nature and nurture: How does our genetic inheritance (our nature) interact with our experiences (our nurture) to influence our development?
Continuity and stages: What parts of development are gradual and continuous? What parts change abruptly in separate stages?
Stability and change: Which of our traits persist through life? Which traits of characteristics of ourselves change as we grow older?

Professor Lee believes that research into conceptual development in children should emphasize how children's concepts reflect the interaction between their specific experiences and their biological predispositions.

Thus, he is focusing in the relationship between our genetic inheritance (by addressing the biological predispositions), and therefore their nature, vs. the specific experiences children have (their nurture).

According to the 3 major issues of Developmental psychology, the theme that fits with Professor Lee's view would be Nature and nurture.