This reusable D3 scatter plot visualizes the Iris dataset, mapping petal length and width on the x- and y-axes while coloring each point by species (green for setosa, purple for versicolor, red for virginica). The code loads CSV data via `d3.csv`, uses `d3.scaleLinear` for axes, and renders circles as SVG marks. It also applies `d3.axisLeft` and `d3.axisBottom` for labeled scales, with axes and text styled via CSS. The plot is fully responsive, sizing to the browser window.