Which of the following is often a risk factor for developing hypertension?

Age is indeed a well-established risk factor for developing hypertension. As individuals get older, the risk of hypertension increases due to various physiological changes that occur in the body over time. These changes can include stiffness of the arteries, increased vascular resistance, and changes in the kidney function that contribute to blood pressure regulation.

In the case of low physical activity levels, while it can contribute to various health issues, it is generally considered a secondary factor rather than a primary one compared to age. Frequent hydration and a high-fiber diet are typically seen as health-promoting behaviors, which can help maintain normal blood pressure rather than contributing to the development of hypertension.