This scatter plot visualizes Fisher’s Iris dataset, comparing sepal length against sepal width with species distinguished by color. The D3 v7 code uses `d3.scaleLinear`, `d3.scaleOrdinal`, `d3.extent`, `d3.axisBottom`, and `d3.axisLeft` to render an SVG chart, loading data via `d3.csv`. Interactive legend hover highlighting fades non-selected species, while a separate world map using `d3.geoNaturalEarth1`, `d3.geoPath`, and TopoJSON is also included in the files.