**Core Concept**
Primordial prevention is a public health strategy aimed at preventing the emergence and development of risk factors in a population before the disease manifests. This approach focuses on maintaining a healthy lifestyle and environment to prevent the development of risk factors that can lead to chronic diseases.

**Why the Correct Answer is Right**
Primordial prevention targets individuals or populations without established risk factors, such as high blood pressure, high cholesterol, or smoking. By implementing policies and interventions at the population level, it is possible to prevent the development of risk factors and reduce the likelihood of chronic diseases. This approach is often implemented through education, awareness campaigns, and environmental modifications, such as promoting healthy diets and increasing physical activity.

**Why Each Wrong Option is Incorrect**
**Option A:** Individuals with risk factors already have an established predisposition to disease, making them a target for secondary or tertiary prevention rather than primordial prevention.
**Option C:** A low prevalence of disease is not a characteristic of primordial prevention, which focuses on preventing the emergence of risk factors before the disease occurs.
**Option D:** Primordial prevention is not focused on individuals with established disease, but rather on preventing the development of risk factors that can lead to disease.

**Clinical Pearl / High-Yield Fact**
Primordial prevention is often the most cost-effective and efficient approach to preventing chronic diseases, as it targets the root causes of disease rather than treating the symptoms.

**✓ Correct Answer: B. Without risk factors**