This interactive scatterplot visualizes the Iris dataset, comparing sepal length and width across three species using D3 v7's SVG rendering. The visualization employs a hover interaction on the legend, which fades non-targeted data points to highlight specific species. The chart features BBC-style color coding, with distinct purple tones assigned to each species. The code uses D3's `select` and `join` APIs to efficiently manage and update SVG elements, while a `ResizeObserver` monitors the container for responsive resizing.