Which factor is linked to a higher risk of noncommunicable diseases?

The correct answer highlights the strong association between smoking and a higher risk of noncommunicable diseases (NCDs). Smoking is a well-known risk factor for several serious health conditions, including heart disease, stroke, lung cancer, and other respiratory diseases. The harmful substances in tobacco smoke can lead to damage in the body's systems, contributing to the development of these chronic diseases.

In contrast, regular physical activity and health check-ups are protective factors that can help reduce the risk of developing NCDs by promoting overall well-being and assisting in early detection and management of potential health issues. Additionally, while poor dietary habits do contribute to NCD risks, smoking has a more direct and significant impact on the development of these diseases, making it a critical focus in public health initiatives aimed at reducing the burden of noncommunicable diseases.