This scatter plot visualizes the Iris dataset, showing sepal length against petal length for three species, each distinguished by color and identified through a legend. The visualization is built with D3.js v7, using SVG rendering and d3.scaleLinear for axes, d3.scaleOrdinal for the color mapping, and d3.csv to load data from a remote gist via a CORS proxy. The code includes a fallback sample dataset in case the remote data fetch fails.