This interactive scatter plot visualizes the relationship between sepal length (x-axis) and petal length (y-axis) for 150 iris flowers, using distinct shapes to differentiate the three iris species. The visualization employs D3’s `scaleLinear` for continuous axes, `scaleOrdinal` with `symbolsFill` to map species to shapes, and custom axes and legend modules. It uses D3’s `csvParse` to load the Iris dataset, and the `symbol` API generates the scatter plot markers and legend symbols. The rendering is implemented with D3’s join pattern to efficiently create and update SVG elements.