Concept:Childhood is divided into three stages: early (2–6 years), middle (6–11 years), and later (11–14 years). Middle childhood is also called the school years. Explanation:Middle childhood spans from age 6 to 11 years. During this period, growth is slow and steady. Children develop social skills, gain enthusiasm for learning, and become more independent. It is a time of integrating within the social context and forming peer relationships. Other stages: infancy (0–2 years) and early childhood (2–6 years). Answer:D. 6 years to 11 years