A React and D3 v5 scatter plot visualizes the Iris Dataset, mapping petal length on the x-axis and sepal width on the y-axis. Each point is colored by species using `d3.scaleOrdinal`. The chart uses `d3.scaleLinear` for axis scales, reusable React components for axes and marks, and SVG circles with tooltips. Data is loaded asynchronously from a CSV URL using `d3.csv`.