This D3 world map visualizes university diversity across U.S. states, using a blue-white linear color scale mapped to each state’s diversity index. Hovering over a state with the mouse reveals a histogram image of that state’s diversity distribution. The visualization uses `d3.geoAlbersUsa` for the projection, `d3.geoPath` for rendering state boundaries, and `d3.legendColor` for the color scale, with data from a static JSON file.