This example renders a scatter plot of the Iris dataset, showing petal length against petal width with color-coded markers for each species (setosa, versicolor, and virginica). It loads CSV data via `d3.csv` and uses `d3.scaleLinear`, `d3.extent`, and axis generators `d3.axisLeft` and `d3.axisBottom` to build the SVG visualization. Circle positions are mapped from the numeric fields, with radial dimensions also set from sepal measurements, though the plot only displays fixed-radius points. The code demonstrates dynamic data parsing and SVG rendering directly in the browser.