This example visualizes the Iris dataset as a scatter plot, using points with distinct symbols to represent different flower species. It maps sepal length to the x-axis and petal length to the y-axis, with a legend identifying each species. The visualization loads data from a remote CSV file via `d3.csvParse` and uses a custom D3 v7 setup with ES6 modules. It leverages `d3.scaleLinear`, `d3.scaleOrdinal`, `d3.symbolsFill`, `d3.symbol`, and `d3.axisLeft` and `d3.axisBottom` to render the chart and its axes, with the plot resizing to the full window.