This choropleth map displays the average 2024 temperature by U.S. state, with cooler states in blue and hotter states in red, according to an illustrative data set embedded in the code. It renders state boundaries as SVG paths using `d3.geoPath` and a `d3.geoAlbersUsa` projection, loading geographic data from the `us-atlas` TopoJSON via `topojson-client`. A hover tooltip and a sequential color scale (`d3.scaleSequential`) complete the interaction and visual encoding.