Which Piaget stage occurs roughly from age 6 or 7 to 11 and enables thinking logically about concrete events and conservation?

• A. Concrete Operational Stage
• B. Preoperational Stage
• C. Sensorimotor Stage
• D. Formal Operational Stage

Answer: (A)

In Piaget's theory, thinking logically about concrete events and understanding conservation appear during the stage where children can perform mental operations on real, tangible objects. This period, roughly from ages 7 to 11, marks the shift from relying on appearances to using logical reasoning with what they can directly observe. They understand that quantity stays the same even if the container is reshaped or the arrangement changes—this is conservation. They also gain skills like decentration (considering multiple aspects of a situation) and reversibility (the idea that operations can be reversed in thought).

Before this stage, in the earlier period, thinking is more egocentric and tied to how things look, so conserving quantity isn’t yet grasped. After this stage, in adolescence, reasoning becomes more abstract and hypothetical, which isn’t required by the question. So the ability described aligns best with the Concrete Operational Stage.