Which of the following is a risk factor for hypertension?

Obesity is a well-documented risk factor for hypertension, which is characterized by elevated blood pressure. Excess body weight can lead to an increase in blood volume and cardiac output, as the heart works harder to supply the additional tissue with blood. Additionally, obesity is associated with other conditions, such as insulin resistance and inflammation, that can further contribute to the development of hypertension.

In contrast, low salt intake tends to lower the risk of developing high blood pressure, as sodium can cause fluid retention and increase blood volume. Regular physical activity is generally associated with lower blood pressure levels and better cardiovascular health. A high-fiber diet can also be beneficial because fiber helps maintain healthy weight and can promote better overall heart health.

Therefore, obesity stands out as a significant risk factor for hypertension among the options provided.