In Jean Piaget's theory, ________ refer to the organised systems of actions and thoughts that allow individuals to mentally represent or think about the objects and events in their world.

Correct option is D

(d) schemes
In Jean Piaget's theory of cognitive development, schemes refer to the organized patterns of behavior or thought that children use to make sense of their experiences. Schemes are the mental structures that children develop as they interact with their environment and enable them to process and store new information in relation to what they already know.