This example visualizes the Iris dataset as an interactive scatter plot, mapping sepal length to the x-axis, petal length to the y-axis, and distinguishing species by different symbol shapes. The plot includes labeled axes and a legend for species, rendered using D3 v7's `scaleLinear` and `scaleOrdinal`. Data is loaded via `csvParse` from a remote URL, with numeric fields converted to numbers. The chart resizes to the viewport and uses d3-fetch to load the CSV, with axes drawn via `axisLeft` and `axisBottom`.