**Core Concept**
Primordial prevention is a public health strategy that aims to prevent the emergence or development of risk factors in a population before they become established. This approach targets the root causes of disease and aims to prevent the development of risk factors that can lead to disease.

**Why the Correct Answer is Right**
Primordial prevention is a proactive approach that focuses on changing the underlying determinants of health, such as lifestyle, environment, and socioeconomic factors, to prevent the development of risk factors. It is a long-term strategy that aims to create a healthy environment and promote healthy behaviors from an early age. This approach is based on the understanding that many risk factors, such as obesity and smoking, are influenced by a complex interplay of genetic, environmental, and socioeconomic factors.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because primordial prevention is not focused on treating established risk factors, but rather on preventing their development in the first place.
**Option B:** This option is incorrect because primordial prevention is not a type of secondary prevention, which focuses on early detection and treatment of disease.
**Option C:** This option is incorrect because primordial prevention is not a type of tertiary prevention, which focuses on managing and preventing complications of established disease.

**Clinical Pearl / High-Yield Fact**
One key aspect of primordial prevention is the importance of addressing the social determinants of health, such as poverty, education, and access to healthcare, in order to prevent the development of risk factors.

**Correct Answer: D. Prevention of the emergence or development of risk factors in a population before they become established.**