This scatter plot visualizes the Iris dataset, showing sepal length against petal length for individual flowers. Each circle represents a sample, though the code does not differentiate species by color. The visualization uses D3 v5 APIs including `scaleLinear`, `extent`, `axisLeft`, `axisBottom`, and `csv` to load and parse the data from a GitHub gist. SVG circles are positioned via margin-based linear scales, while axis labels are rotated and placed manually. The chart auto-sizes to the browser window using `innerWidth` and `innerHeight`.