This example shows the classic Iris Dataset scatter plot, with each point representing an iris flower colored by species (blue for setosa, red for versicolor, black for virginica). It plots petal length on the x-axis and petal width on the y-axis. The code loads data via `d3.csv`, scales positions with `d3.scaleLinear`, and renders SVG circles with `d3.axisLeft` and `d3.axisBottom` for the axes. Although `rx` and `ry` attributes are set, the circles use a fixed radius.