This scatter plot visualizes the Iris dataset, plotting petal length on the x-axis against sepal length on the y-axis. It uses d3.csv to load the data, d3.scaleLinear for scaling, and d3.axisLeft and d3.axisBottom for tick marks. The SVG circles are rendered pink, matching the chart’s background, with margins sized proportionally to the viewport. The code reads window dimensions and appends the chart directly to the body.