This example shows a scatter plot of the Iris dataset, mapping petal length on the x-axis and petal width on the y-axis. Points are colored by species (skyblue for setosa, lightgreen for versicolor, orange for virginica), with a fixed radius of 5 pixels. The visualization uses D3 v6 APIs including `d3.csv`, `d3.scaleLinear`, `d3.extent`, `d3.axisLeft`, and `d3.axisBottom`. Data is loaded from a remote CSV URL containing sepal and petal measurements, and rendered as SVG circles. Axis labels are added using SVG text elements. The code also retrieves sepal length and width values for each datum but does not use them for positioning. The chart is sized to the full browser window.