This scatter plot visualizes the Iris Dataset, showing petal length against sepal width with points colored by species. An interactive color legend on the right allows users to hover over a species name, which highlights points of that species by fading all other circles to partial opacity. The visualization uses React with D3 v5 scales and SVG rendering, employing `scaleLinear`, `scaleOrdinal`, and custom React components for axes, marks, and the legend. Data is loaded asynchronously via D3's `csv` method from a GitHub gist.