What factors are listed by the World Health Organization as causes of the diabetes epidemic?

The World Health Organization identifies several key factors that contribute to the diabetes epidemic, primarily focusing on lifestyle and behavioral aspects. Excess weight gain, being overweight, and obesity are strongly linked to the development of type 2 diabetes due to their effects on insulin sensitivity and overall metabolic health. As body fat increases, particularly around the abdomen, the risk of developing insulin resistance rises, leading to impaired glucose metabolism.

In addition to weight-related factors, physical inactivity is also a significant contributor. A sedentary lifestyle reduces the body's ability to use insulin and transport glucose effectively, which can exacerbate the risk for diabetes. Regular physical activity helps to manage weight and improve insulin sensitivity, making it a critical factor in preventing and managing diabetes.

Together, these factors clearly illustrate the link between lifestyle choices and the increasing prevalence of diabetes worldwide, making this the correct answer regarding the causes of the diabetes epidemic as stated by the World Health Organization.