This scatterplot visualizes the Iris dataset, plotting sepal length against sepal width for three species of iris flowers. Each point is colored by species using `d3.scaleOrdinal`, with a legend identifying the categories. The chart is rendered as an SVG using D3 v7, with linear scales from `d3.scaleLinear` mapping data to coordinates. Axes are drawn with `d3.axisBottom` and `d3.axisLeft`, and the data is loaded via `d3.csv` from a remote gist.