This example displays a scatter plot of the Iris dataset, using distinct symbol shapes for each species to show petal length against sepal length. It loads D3 v7 via UNPKG and demonstrates modular ES6 imports for local modules like `scatterPlot.js` and `axes.js`. The visualization uses `d3.scaleLinear`, `d3.scaleOrdinal`, `d3.symbolsFill`, and `d3.symbol` to render shapes, while a custom legend with `d3.axisLeft` and `d3.axisBottom` shows the species mapping. Data is fetched as CSV and parsed with `d3.csvParse`.