Which of the following is not one of the essential public health services?

The essential public health services framework outlines a set of foundational public health activities that are critical for promoting health and preventing disease within communities. Among these services are linking people to needed health services, enforcing laws and regulations that protect public health, and informing and educating the public about health issues.

Developing marketing strategies, while it can be a valuable tool in public health communication, is not classified as an essential public health service. This is because marketing strategies, which may include branding and promotional tactics aimed at increasing awareness or encouraging healthy behaviors, don't inherently ensure access to health services or direct interventions in public health. Instead, the essential services focus on actions that directly influence the health of the population and ensure that necessary health resources and information are available to the community.

Thus, the correct identification of the non-essential public health service highlights the importance of recognizing core activities that define public health practice.