The visualization displays the classic Iris dataset as a scatter plot, mapping sepal length on the x-axis and sepal width on the y-axis for 150 samples. Each point is color-coded by species (setosa, versicolor, virginica), with tooltips revealing the exact measurements on hover. Built with D3 v7, the SVG chart uses `d3.csv` to load data, `d3.scaleLinear` for axes, `d3.scaleOrdinal` for colors, and `d3.axisBottom`/`d3.axisLeft` for ticks. A legend and animated tooltip transitions provide clear interaction.