A D3 scatter plot displays the Iris dataset, mapping petal length on the x-axis and sepal length on the y-axis. Each flower is represented as a circle with a fixed radius of 5 pixels. The visualization uses `d3.csv` to load the data, `d3.scaleLinear` for both axes, and `d3.extent` to compute the domains. Axes are rendered with `d3.axisLeft` and `d3.axisBottom`, with the SVG filling the full browser window. The chart is built using D3 v6 and styled with a 24-pixel tick font.