**Core Concept**
Prevention of obesity is a prime example of primary prevention, which aims to prevent the occurrence of a disease or condition in an individual or population before it occurs. This approach focuses on eliminating or reducing the risk factors that contribute to the development of a disease.

**Why the Correct Answer is Right**
Primary prevention involves measures such as promoting healthy diet and exercise habits, reducing sedentary behavior, and avoiding environmental factors that contribute to weight gain. By targeting these risk factors early on, individuals can reduce their likelihood of developing obesity and its associated comorbidities. This approach is particularly effective in preventing obesity in children and adolescents, where habits and lifestyle choices are more easily shaped.

**Why Each Wrong Option is Incorrect**
**Option A:** Secondary prevention is incorrect because it involves early detection and treatment of a disease that has already occurred, rather than preventing it from occurring in the first place.
**Option B:** Tertiary prevention is incorrect because it focuses on managing and mitigating the effects of an established disease, rather than preventing it from occurring.
**Option C:** Primordial prevention is incorrect because it involves preventing the development of risk factors that contribute to a disease, rather than preventing the disease itself.

**Clinical Pearl / High-Yield Fact**
It is essential to recognize that obesity is a preventable condition, and that primary prevention strategies can be highly effective in reducing its incidence. By promoting healthy lifestyle choices and reducing exposure to risk factors, individuals can significantly reduce their risk of developing obesity and its associated complications.

**Correct Answer:** C. Primordial prevention is incorrect because it involves preventing the development of risk factors that contribute to a disease, rather than preventing the disease itself.