This interactive scatter plot visualizes the Iris dataset, plotting petal length against sepal width. The SVG visualization uses React and D3.js to display circles colored by species. Hovering over a species name in the color legend, implemented with d3.scaleOrdinal, highlights those data points by rendering them at full opacity while fading all other circles to 20% opacity. The chart includes Cartesian axes with tick marks and labels generated from d3.scaleLinear scales.