This example visualizes the Iris flower dataset, plotting sepal length against sepal width as a scatter plot of blue circles. The chart uses React components to render SVG elements, with D3’s `scaleLinear` and `min`/`max` functions determining the axis domains. The `AxisBottom` and `AxisLeft` components generate tick marks and labels, while the `Marks` component maps each data point to a circle. Data is loaded asynchronously via D3’s `csv` from a GitHub-hosted CSV file, and axes are styled with CSS classes.