Final answer:
Less accurate Canon of Proportions for estimating height in teens is due to their ongoing growth and variable changes in body proportions during adolescence, compared to adults' stabilized proportions.
Step-by-step explanation:
The use of Canon of Proportions for estimating height is likely to provide less accurate data in teens than in adults due to the ongoing growth and changes in body proportions during adolescence. While adults have reached their maximum height and their body proportions have stabilized, teens are still growing, which means that their limbs and torso may not be in final proportion to each other yet.
Adolescents experience significant growth spurts, and their limbs and torso can grow at different rates. This can lead to a situation where the proportional rules that apply to adult bodies do not align well with those of teenagers. For example, a male child will typically reach 50% of his adult height by age 2 but only 50% of his adult weight at about 11 years of age, indicating different growth patterns for height and weight.
Additionally, since teenagers are at various stages of puberty, the rates of growth and body proportion changes can vary widely from one teen to another, making it difficult to apply a one-size-fits-all standard like the Canon of Proportions. As teenagers progress toward adulthood, their body proportions will gradually conform more closely to the established canons of proportion, thus making those canons more applicable for height estimation in adults.