Concept:Jean Piaget’s theory states that children actively build their own knowledge through exploration and interaction with the world, not by passively receiving information.Explanation:Piaget argued that knowledge is not simply absorbed from the environment. Instead, children construct it by forming mental frameworks called “schemas.” When they encounter new experiences, they adjust their schemas to make sense of the world. This process is active, not passive. Option A is wrong because knowledge for Piaget is more than just observable behaviour. Option C is wrong because knowledge is not innate; it develops through experience. Option D is partially correct, but Piaget emphasized the child’s own construction over social co-construction. Only option B directly matches his core idea: knowledge is built by the child, not passed on.Answer:B. constructed by the child rather than being passed passively from the environment.