Final answer:
The most prominent change to the complement of growth charts for older children and adolescents is the addition of the adolescent growth spurt (AGS) growth curves.
Step-by-step explanation:
The most prominent change to the complement of growth charts for older children and adolescents is the addition of the adolescent growth spurt (AGS) growth curves. The AGS is a period of rapid growth in body size that occurs during puberty, characterized by faster height and weight increase than at any time since early childhood. This growth spurt is controlled by hormones, including growth, thyroid, and sex hormones.