Question

which other characteristics must be taken into account to calculate bmi for children and teens, in addition to height and weight?

gender and age
gender and activity level
percentage of muscle mass and body fat
age and activity level

Explanation:

BMI for children and teens varies by gender and age. Growth patterns differ between genders and change with age, so these factors are crucial for accurate BMI - related health assessments. Activity level, muscle mass, and body - fat percentage are not directly used in the basic BMI calculation but are related to overall health.

Answer:

A. gender and age