Concept:Piaget viewed cognitive development as active adaptation to the environment.
Children build knowledge by changing their mental schemas to fit new experiences.
Explanation:Piaget's theory is based on two key processes: assimilation and accommodation.
Assimilation fits new information into existing schemas.
Accommodation modifies schemas when new information does not fit.
Together, these processes lead to adaptation — adjusting thinking to match the environment.
Option A is wrong because development is not just adding facts; it involves restructuring schemas.
Option B is wrong because Piaget argued that cognitive development comes before language.
Option C describes Vygotsky's theory, not Piaget's.
Therefore, the correct view is that cognitive development is adapting to the environment by changing schemas.
Answer:D. is the process of adaptation to the environment by changing one's schemas.