This interactive scatter plot displays the classic Iris dataset, plotting sepal length against sepal width for 150 flowers across three species. Built with React and D3 v7, the visualization renders circles as SVG elements, with clicking a point highlighting it by turning it white with a black stroke. The code uses `d3.scaleLinear` and `d3.extent` to create scales, `d3.axisBottom` and `d3.axisLeft` for axes, and a `ResizeObserver` to make the chart responsive to its container.