Final answer:
The author provided an overview of ways to stay healthy to set the stage for discussing the importance of diet and lifestyle in achieving wellness, as well as to highlight the shift from a simplistic view of health to a holistic wellness approach that includes healthy eating and being active.
Step-by-step explanation:
The author likely began the article with an overview of ways that people can stay healthy to provide context and background for the importance of health and diet. Presenting evidence from the World Health Organization and historical trends emphasizes the evolving understanding of health and wellness. By starting with an overview, the article sets the stage for discussing current dietary trends, such as the Mediterranean and paleo diets, and their role in maintaining health. Furthermore, the article likely aims to illustrate the shift from viewing health as merely the absence of illness to a comprehensive wellness approach that includes healthy eating and an active lifestyle as foundational components of long-term health.