6. the classification by age is a genus of 5 main categories: 6.1 6.2 children 2-3 years children 3-6 years. 6.3 6.4 children 6-11 years old children 11-14 years. 6.5 children aged 14 to 18
6. categorized by age only. Divided into five categories, namely 6.1 children aged 2-3 years, 6.2 children aged 3-6 years old children 6 -11 years 6.3 6.4 children aged 11-14 years, 6.5 children aged 14-18 years.
6. Categorized according to age as the main can be classified into 5 types.6.1 children 2 - 3 years 6.2 children 3 - 6 years.6.3 children 6 - 11 years 6.4 children 11 - 14 years.6.5 children 14 - 18 years.