This D3 scatter plot visualizes the classic Iris dataset using petal length along the x-axis and sepal length along the y-axis. The code loads data asynchronously from a CSV URL, converts numeric fields, and computes linear scales with `d3.scaleLinear`. It renders circles in an SVG container sized to the browser window, with axes drawn via `d3.axisLeft` and `d3.axisBottom`. The visualization demonstrates D3’s data-binding and layout pipeline for a simple multi-point chart.