This scatter plot visualizes the Iris dataset, displaying petal length versus sepal length for 150 flower samples. The visualization uses D3 v4 with SVG rendering, employing `d3.scaleLinear` for both axes and `d3.axisBottom`/`d3.axisLeft` for tick marks. Data is loaded from a CSV file using `d3.csv`, with axis labels and margins configured for readability. The plot shows a clear positive correlation between the two measurements, with points clustering into distinct groups based on flower species.