This world map visualizes countries using a Natural Earth 110m TopoJSON dataset, with nations color-coded by continent: North America alternates blue and red, Europe alternates red and green, and Africa appears in black. The map uses D3’s `geoNaturalEarth1` projection and `geoPath` to render countries as SVG paths within a React component. Hovering over a country darkens its fill and thickens its stroke via mouseenter and mouseleave event handlers.