This scatter plot visualizes the Iris dataset, mapping petal length on the x-axis against sepal length on the y-axis. Using D3 v7, it loads CSV data via `d3.csv`, applies linear scales with `scaleLinear`, and renders circles as marks. Axes are drawn with `axisLeft` and `axisBottom`, and the SVG canvas fills the browser window. The code explicitly parses numeric fields and converts data values into pixel coordinates for each point.