This example shows a scatter plot of the Iris Dataset, mapping petal length to the x-axis and sepal length to the y-axis as red circles with hover tooltips. Built with React and D3 v5, it uses `scaleLinear` for both axes, `csv` for data loading, and `extent` to set the domains. Axes are rendered as SVG groups with custom tick lines and labels, while the `Marks` component generates each circle and its title element for tooltip display.