This scatter plot visualizes the Iris dataset, showing sepal length against petal length with points colored by species. The chart uses D3 v7’s `scaleLinear` for axes, `scaleOrdinal` with `symbolsFill` to assign distinct shapes to each species, and a custom legend to map shapes to species names. Data is loaded from a remote CSV via `fetch` and parsed with `d3.csvParse`, with numeric fields coerced to numbers. The visualization updates reactively through a simple state management pattern, re-rendering the SVG on data arrival.