This example shows a scatter plot of the Iris dataset, mapping sepal length to the x-axis and petal length to the y-axis, with the species of each flower indicated by a distinct symbol (circle, square, or triangle). A legend on the right identifies the species-to-shape mapping. The visualization is built using D3 v7, leveraging `scaleLinear` for the axes, `scaleOrdinal` with `symbolsFill` for the shapes, and D3's `symbol` generator to draw the marks. The data is loaded asynchronously from a GitHub-hosted CSV file, and the chart is rendered into an SVG canvas.