This example displays the classic Iris dataset as a scatter plot, mapping petal width to the x-axis and sepal length to the y-axis, with each of the three species represented by a distinct symbol. The visualization is rendered as an SVG using D3 v6, leveraging a reusable `scatterPlot` module that employs `scaleLinear`, `scaleOrdinal`, `symbol`, and `axisLeft`/`axisBottom` APIs to position marks and axes. Data is loaded asynchronously from a CSV URL, and the plot fills the browser window, with axes labeled via D3's tick rendering.