This scatter plot displays sepal length against petal length for the Iris dataset, with each of the three species represented by a distinct symbol shape and a legend. The visualization uses D3 v7 APIs including `scaleLinear`, `scaleOrdinal`, `symbol`, and `symbolsFill` to map data to positions and shapes. Data is loaded via `d3.csvParse` from a remote CSV file, and the chart includes labeled axes and a shape legend positioned at a fixed coordinate.