Which situation exemplifies secondary prevention?

Secondary prevention focuses on early detection and intervention to prevent the progression of diseases or health issues that have already occurred. The correct answer, which is screening for high cholesterol levels, typifies this concept as it involves testing individuals to identify risk factors or health issues early on, before they lead to more serious conditions such as heart disease or stroke. By identifying elevated cholesterol levels, healthcare providers can then implement strategies to manage the condition effectively, potentially preventing further complications.

In contrast, teaching clients about healthy diets pertains more to health education and promotion, which aligns with primary prevention by aiming to prevent health problems before they arise. Providing mental health support after a crisis falls under the realm of tertiary prevention, focusing on rehabilitation and support after an illness or event. Finally, offering cardiac rehabilitation services also aligns with tertiary prevention, aiming to improve the quality of life and prevent further cardiac events after a diagnosis has been made. Therefore, screening for high cholesterol is a clear example of secondary prevention, emphasizing the importance of early detection and intervention in managing health risks.