This scatter plot visualizes the Iris dataset, showing sepal length against petal length. Points are colored and shaped by species, with a legend mapping shapes to species names. The visualization is built using D3 v7, specifically using `d3.scaleLinear`, `d3.scaleOrdinal`, `d3.symbol`, and `d3.axisLeft`/`d3.axisBottom` for axes. The code fetches a CSV file, parses it with `d3.csvParse`, and converts numeric columns to numbers before rendering the plot with SVG paths.