Concept:Piaget’s theory says children actively build their own knowledge through interaction with the world, not by passively receiving information.Explanation:Piaget argued that knowledge is constructed by the child. Children explore, interact, and form mental schemas. They adapt these schemas when faced with new experiences. This is active construction, not passive absorption. Options A and C are wrong because they treat knowledge as merely behaviour change or innate. Option D (co-construction with others) is partially true, but Piaget emphasised the child’s own active role more than social interaction.Answer:Option B: constructed by the child rather than being passed passively from the environment.