This interactive scatter plot visualizes the classic Iris dataset, showing the relationship between any two of its four features (sepal length, sepal width, petal length, and petal width) for three flower species. Users select the x-axis and y-axis feature via a custom button panel, which triggers d3 v5 to update the chart. The SVG render displays semi-transparent colored circles representing each species, with axis labels and a legend. The code uses d3.csv to load data, scaleLinear for scales, and axisBottom and axisLeft with gridlines to build the plot.