Final answer:
Obesity is defined by the body mass index (BMI), which is a measure of an individual's weight-to-height ratio. The normal, or healthy, BMI range is between 18 and 24.9 kg/m². Obesity can lead to health issues like heart disease and diabetes.
Step-by-step explanation:
Obesity is defined by the body mass index (BMI), which is a measure of an individual's weight-to-height ratio. The normal, or healthy, BMI range is between 18 and 24.9 kg/m². Overweight is defined as a BMI of 25 to 29.9 kg/m², and obesity is considered to be a BMI greater than 30 kg/m². Obesity can lead to various health issues, including coronary heart disease, type 2 diabetes, and certain types of cancer.