Which of the following is a behavioral (modifiable) risk factor for dental caries, rather than a demographic factor?

Nutrition and dietary habits (especially frequency of fermentable carbohydrate intake) are behavioral and modifiable risk factors for dental caries. Gender, age, and socioeconomic status are demographic factors — characteristics of the individual or their social context that cannot be directly changed by the patient's behavior. Identifying modifiable behavioral factors is key to preventive dentistry strategies.