This example displays a world map using a natural Earth projection, with countries rendered as light green SVG paths and oceans shown as a blue sphere. The code loads geographic data from the world-atlas TopoJSON file, converts it to GeoJSON using the topojson `feature` function, and draws it with `d3.geoPath` and `d3.geoNaturalEarth1` from D3 v5. A single SVG element sized 960 by 500 hosts the visualization.