In the context of 'psychological theories of development and maturation', regarding the scientific nature of biologically determined 'developmental schedules' and the concept of 'reciprocal interweaving' proposed by Arnold Gesell under his 'Maturation Theory', and the mutual interrelationships of the processes of 'assimilation', 'accommodation', and 'equilibration' under Jean Piaget's 'Theory of Cognitive Development', along with their implications in determining modern child-centered classroom teaching, developmentally appropriate practices, and students' readiness for learning, which of the following statements is most appropriate and true?

Arnold Gesell's 'Maturation Theory' explains that development is directed by internal biological programs (such as 'reciprocal interweaving' where motor and behavioral systems mature sequentially). On the other hand, Jean Piaget's 'Theory of Cognitive Development' clarifies that through active interaction with the environment, a child achieves 'equilibration' via 'assimilation' (incorporating new information into existing schemas) and 'accommodation' (modifying existing schemas). Both theories together explain that children's learning readiness and developmental levels depend on the complex interrelationship of biological maturation and environmental experiences, which forms the basis of modern child-centered and developmentally appropriate teaching practices.