This scatter plot visualizes the Iris dataset, mapping petal length and width on the x- and y-axes while coloring each point by species. It also encodes sepal measurements as the horizontal and vertical radii of the circular marks, though the visual effect is subtle. Built with D3 v6, the code loads CSV data via `d3.csv`, scales it with `d3.scaleLinear`, and renders SVG circles using `selectAll` and `join`. Axis labels are added with `axisLeft` and `axisBottom`. Data is sourced from a GitHub-hosted CSV file.