This visualization is a scatter plot of iris flower measurements, showing sepal length against petal length with each species (setosa, versicolor, virginica) distinguished by a unique symbol. The plot includes linear axes for both numerical variables and a separate legend key that maps each species to its corresponding shape. Built with D3 v7, the code uses `scaleLinear` and `scaleOrdinal` to map data values to positions and shapes, while `symbol()` from D3 generates the custom mark paths. The chart loads the iris dataset from a remote CSV file and renders responsively to fill the browser window. The implementation uses D3's join operation to efficiently create and update the SVG elements for marks, axes, and legend.