This scatter plot visualizes the Iris dataset, showing petal length against petal width with points colored by species (setosa in skyblue, versicolor in lightgreen, and virginica in orange). The visualization uses D3 v6 APIs including `d3.csv` for data loading, `d3.scaleLinear` for the x and y axes, `d3.extent` to compute data domains, and `d3.axisLeft`/`d3.axisBottom` for axis rendering. The SVG is sized to the browser window, with data fetched from a GitHub-hosted CSV file. The code also stores sepal dimensions in each mark, though these are not used in the final rendered circles.