This scatter plot visualizes the Iris dataset, mapping petal length on the x-axis and petal width on the y-axis, with each species color-coded (blue, yellow, red) and circle size proportional to sepal dimensions. Built with D3 v6 in a React context, it uses `scaleLinear`, `extent`, `axisLeft`, and `axisBottom` to render the SVG axes. Data is loaded via `d3.csv` from a GitHub gist, and `selectAll().join()` creates the circles with `r`, `rx`, and `ry` attributes for square-like markers.