Final answer:
Body Mass Index (BMI) is the standard for evaluating body weight based on the relationship between weight and risk of certain chronic diseases.
Step-by-step explanation:
The standard for evaluating body weight based on the relationship between weight and risk of certain chronic diseases is Body Mass Index (BMI).
It is calculated by dividing a person's weight in kilograms by the square of their height in meters.
For example, if a person weighs 70 kilograms and their height is 1.75 meters, their BMI would be calculated as 70 / (1.75 ^ 2) = 22.86.
Learn more about Body Mass Index (BMI)