Concept:Early childhood is a specific developmental stage in human growth, typically defined as the period from 2 to 6 years of age.Explanation:Childhood spans from birth to puberty and includes several stages. Early childhood is one such stage, lying between 2 and 6 years. This phase is also called the toy age, pregang age, or exploratory age. During this time, children develop language skills, begin using words and pictures to represent objects, and learn to compare objects by external features. They face challenges with conservation, centration, and reversibility. Social skills also improve as they coordinate their emotions with others. This period is crucial for overall development. In contrast, middle childhood extends from 6 to 10 years, and later childhood begins around 10–12 years with puberty. Therefore, early childhood specifically refers to the age range 2 to 6 years.Answer:Option A: 2 to 6 years