Answer:
Preoperational stage
Explanation:
Your nephew is currently at the preoperational stage of development, according to Piaget. This stage occurs between the ages of 2 and 7 years old. At this stage, children begin to understand symbols. However, their language skills are still limited. Another characteristic of this stage is that children are egocentric, and struggle to see things from the point of view of other people. Because of this, your nephew answers in a way that reflects his own desires, not his mother's.