What term is used to describe the moment when a child begins to think logically about concrete events?

The correct term for the moment when a child begins to think logically about concrete events is the Concrete Operational Stage. This stage, as identified by developmental psychologist Jean Piaget, typically occurs between the ages of 7 and 11 years. Children in this stage develop the ability to think logically about concrete situations and understand the concept of conservation, which means they can recognize that quantity doesn't change even when its shape does.

During this period, children are capable of organizing objects into categories and understanding the relationships between them, which signifies a major progression in their cognitive development. They begin using inductive logic or reasoning from specific information to a general principle. This development marks a departure from the previous Preoperational Stage, where thinking is more egocentric and less organized.

In contrast, the other stages listed represent different phases of cognitive development that do not match this logical thinking about concrete events. The Sensorimotor Stage, occurring from birth to about 2 years, focuses on sensory experiences and motor actions. The Preoperational Stage spans approximately 2 to 7 years, where children's thinking is characterized by symbolic play and a lack of logical reasoning. The Formal Operational Stage, beginning around age 12, involves abstract and hypothetical thinking, beyond just concrete events.