This scatter plot visualizes the Iris dataset, comparing sepal length and width across three species, with points colored by species and an interactive legend that highlights one species at a time. The chart uses D3.js APIs like `scaleLinear`, `scaleOrdinal`, `axisBottom`, and `axisLeft` to render axes and scales, while `ResizeObserver` handles responsive resizing. Data loads from a CSV via `d3.csv`, and BBC-style colors are applied to distinguish each species.