Answer: Piaget's 3rd stage of development or known as Concrete Operational
Explanation:
The Piaget's 3rd stage of development also known as Concrete Operational tends to occurs in between ages 7 to 11. Under this children can start performing concrete operations. They tend to start reasoning logically only if it can be applied to concrete examples . Also the children start developing the ability where they tend to classify and divide factors into different sets and ponder upon their interrelationships .