This D3.js scatter plot visualizes the Iris dataset, mapping petal length and petal width to the x- and y-axes while coloring points by species (setosa, versicolor, virginica). The SVG rendering uses `d3.csv`, `d3.scaleLinear`, `d3.extent`, and `d3.axisLeft`/`d3.axisBottom` to produce a full-width interactive chart. Circles include `rx` and `ry` attributes from sepal measurements, though these do not affect the visible circular markers, which have a fixed radius. The plot loads raw CSV data from a GitHub gist and labels both axes.