A React scatter plot visualizes the Iris dataset, showing sepal length against sepal width. Each of the three species receives a distinct color via D3's `scaleOrdinal`. The visualization uses D3's `scaleLinear` and `extent` for axes, with custom React components generating SVG ticks and circles. Hovering reveals formatted values via native SVG `<title>` tooltips. Data loads asynchronously from a CSV URL using a custom `useData` hook.