This interactive scatter plot visualizes Fisher’s Iris dataset, comparing sepal length and width across three species of iris flowers. The chart uses D3 v7’s `scaleLinear`, `scaleOrdinal`, `axisBottom`, and `axisLeft` to map quantitative dimensions and species colors, with points rendered as SVG circles. Hovering over legend items highlights the corresponding species by raising matching points and fading others, driven by shared state managed through a `ResizeObserver` for responsive layout.