Which of the following is an example of a modifiable risk factor?

Physical inactivity is an example of a modifiable risk factor because it is within an individual's control to change their level of physical activity. Increasing physical activity can significantly reduce the risk of various health conditions, such as heart disease, diabetes, and obesity.

Modifiable risk factors are those that can be altered or influenced through lifestyle changes, medication, or intervention strategies. In contrast, heredity and age are non-modifiable risk factors, as they are inherent characteristics that cannot be changed. Environmental exposure can sometimes be influenced, but it often involves factors that may not be easily modified by an individual, such as pollution or workplace hazards. Therefore, in this context, physical inactivity stands out as the most clear example of a risk factor that an individual can actively manage and modify to improve their health outcomes.