This example displays a world map using the Natural Earth projection, rendered as SVG paths for country boundaries, a graticule grid, and an outline. It loads geographic data from the visionscarto world-atlas TopoJSON file via `fetch`, converts it to GeoJSON with `topojson.feature`, and renders it using `d3.geoPath` and `geoNaturalEarth1`. The visualization uses `d3.select` for DOM manipulation and a simple state management pattern to handle asynchronous data loading.