This interactive scatter plot visualizes Fisher's Iris dataset, comparing sepal length and width across three species. The chart uses color-coded points and a clickable legend that highlights a selected species while fading others, enhancing comparison. Built with D3.js, it employs `scaleLinear`, `scaleOrdinal`, and `axisBottom` for scales and axes, using `ResizeObserver` for responsive sizing and `renderSVG` for output. Styling follows BBC color themes, with data loaded from a CSV source.