This example visualizes the Iris Dataset, showing clustered circles that represent individual iris flowers based on their sepal and petal lengths. The data is loaded via `d3.csv` and rendered as an SVG scatter plot using `d3.scaleLinear` for axes and `d3.scaleOrdinal` with `d3.schemeCategory10` for color mapping by species. A categorical color legend is added with `d3.legendColor`, and axis styling includes custom tick lines and labels.