A choropleth map of the United States displays the total number of homeless persons per state in 2021, with darker blue shades indicating higher counts. Hovering over a state reveals a tooltip with its exact value. The visualization uses D3 v7 with `d3.geoAlbersUsa` projection and `d3.geoPath` to render SVG paths from a GeoJSON file, while a threshold color scale maps data values to a blue scheme. Data comes from a CSV file containing state-level homeless population totals.