Final answer:
The action with the greatest potential to reduce an individual's risk for developing diabetes is to lose weight, if obese.
Step-by-step explanation:
The action with the greatest potential to reduce an individual's risk for developing diabetes is to Lose weight, if obese. Obesity is a major risk factor for diabetes, and losing weight can improve insulin sensitivity and help reduce blood glucose levels to normal ranges. By adopting healthier behaviors such as a balanced diet and regular exercise, individuals can effectively reduce their risk for developing diabetes.