This scatter plot visualizes the classic Iris dataset, showing the relationship between petal length and sepal length for three flower species. The D3 v5 code uses `scaleLinear` and `extent` to map data values to SVG coordinates, with React components handling axis rendering and circle marks. Each species receives a distinct color and opacity through CSS classes. The visualization includes labeled axes with formatted tick marks and a native SVG `<title>` tooltip that reveals the species name on hover.