Answer: Hi there! Your answer should be B (height to weight ratio of an individual).
Step-by-step explanation:
The CDC explains that a Body Mass Index (or BMI) is "...a person's weight in kilograms divided by the square of height in meters."
BMII is a simple calculation centering on a person's height and weight. The formula to find said ratio is as follows: BMI = kg/m2. In this equation, kg is a person's weight in kilograms; with that, m2 amounts to their height in meters squared.
Hopefully, this helps you out. Please stay safe, and have a good day/evening/night! :)