Answer:
B. an individual's height-weight ratio
Step-by-step explanation:
Body Mass Index or BMI is found out by dividing the body mass in kg by the square of the body height in m². Hence its value is derived from the height and weight of a person and depends on an individual's height-weight ratio.
It is used to classify people as underweight, normal, overweight or obese. The accepted classification is as follows:
- Below 18.5 kg/m² : underweight
- 18.5 - 25 kg/m² : normal weight
- 25 - 30 kg/m² : overweight
- over 30 kg/m² : obese