This scatter chart visualizes the relationship between petal length and sepal width in Fisher's Iris dataset, loaded as CSV data via D3's `csv` utility. The code uses `scaleLinear` to map data values to SVG coordinates, with axes generated by custom React components that render tick marks and labels. The chart is built with React and D3 v5, rendering circles with tooltips showing formatted values. The dataset is fetched from a gist URL and parsed in a custom `useData` hook.