A scatter plot visualizes the Iris dataset by mapping petal width to the x-axis and sepal length to the y-axis, with each circle colored by species (blue, orange, or green). The SVG rendering uses D3 v6 APIs including `d3.csv`, `scaleLinear`, `extent`, `axisLeft`, and `axisBottom`, with circles positioned by projecting data values through the scales. Axis labels are added as SVG text elements. The plot fills the browser window, with data parsed from a GitHub-hosted CSV file.