A world map uses D3.js’s `geoNaturalEarth1` projection and `geoPath` to render landmasses, graticules, and country borders from TopoJSON data loaded via the `json` method. React manages the application state through a custom `useData` hook, which fetches and processes the world-atlas countries dataset. The SVG output displays countries in teal with red interior boundaries over a gray sphere, while graticule lines add spatial reference. The visualization adapts to the browser window size.