An interactive scatterplot of the Iris dataset maps petal length against sepal width, with points colored by species through a categorical legend. Dropdown menus allow re-selecting X and Y axes from four floral measurements. Built with React and D3 v5, it renders an SVG using `scaleLinear` for axes, `scaleOrdinal` for color encoding, and custom `AxisBottom`, `AxisLeft`, `ColorLegend`, and `Marks` components for tick marks and circles. Tooltips display formatted values on hover.