Which of the following behaviors is most clearly associated with Jean Piaget’s concrete operational stage?

In Jean Piaget's concrete operational stage, children typically exhibit several specific behaviors that are characteristic of this stage. These behaviors include:

1. Conservation: Children in the concrete operational stage understand the concept of conservation, which means they recognize that the quantity or amount of a substance remains the same even if its appearance or arrangement changes. For example, they understand that pouring water from a tall, narrow glass into a short, wide glass does not change the amount of water.

2. Reversibility: Children at this stage can mentally reverse actions or operations. They understand that if a certain action is performed, it can be undone or reversed. For instance, they can mentally reverse the steps of a puzzle or a series of movements.

3. Classification: Children in the concrete operational stage can classify objects into different categories based on their characteristics. They can group objects based on similarities and differences, such as sorting objects by color, shape, or size.

4. Seriation: Children at this stage can arrange objects in a specific order or series based on a particular attribute. For example, they can arrange objects from smallest to largest or arrange numbers in ascending or descending order.

5. Logical thinking: Children in the concrete operational stage demonstrate more logical and systematic thinking. They can understand cause and effect relationships, make logical deductions, and solve problems using logical reasoning.

Therefore, the behavior most clearly associated with Jean Piaget's concrete operational stage is the ability to demonstrate conservation, which involves understanding that the quantity or amount of a substance remains the same despite changes in appearance or arrangement.