This choropleth displays the fifty US states overlaid with white interior borders, using pink fill that shifts to a warm orange on hover. The map is rendered as an SVG using a React component that loads TopoJSON geographic data from the `us-atlas` package, projecting it with the `geoAlbersUsaTerritories()` function. The `d3.geoPath()` API converts the data into SVG paths, while `topojson.feature()` and `topojson.mesh()` extract boundaries and interior lines from the source topology.