Which of the following is an uncontrollable risk factor that may increase the risk of disease?

Genetics is an uncontrollable risk factor because it refers to the hereditary factors that influence an individual's risk of developing certain diseases. These factors are inherited from one's parents and are beyond an individual's control. Genetic predispositions can significantly impact a person's likelihood of developing various conditions, such as heart disease, diabetes, and certain types of cancer, regardless of lifestyle choices or behaviors.

On the other hand, the other options listed, such as physical activity level, dietary habits, and smoking, are all controllable risk factors. Individuals have the ability to modify their level of physical activity, make healthier dietary choices, or quit smoking, which can significantly impact their overall health and risk of disease. Understanding the distinction between controllable and uncontrollable risk factors is crucial for effective health management and disease prevention strategies.