This scatterplot displays the Iris dataset, plotting petal length against sepal width for individual flowers. The React application loads CSV data via the `csv` function from D3 v5 and renders SVG circles using reusable axis and mark components. Linear scales map data values to pixel coordinates, with margins defining the chart’s inner dimensions. Axes are generated from scale ticks, while tooltips appear via SVG `<title>` elements. The visualization uses d3.scaleLinear, d3.extent, and d3.format for tick formatting.