This interactive scatter plot displays the classic Iris dataset, showing measurements of sepal length, sepal width, petal length, and petal width for three species of iris flowers. Users can change the variables plotted on the x- and y-axes via dropdown menus, with each species colored differently using `d3.scaleOrdinal` and `d3.schemeCategory10`. The visualization uses D3 v5 with SVG rendering, employing `d3.axisBottom` and `d3.axisLeft` for axes, `d3.scaleLinear` for positioning, and `d3.extent` to set the scale domains.