This interactive scatter plot lets users explore the classic Iris dataset by selecting any two numeric attributes for the x- and y-axes via dropdown menus. Each flower species is color-coded using `d3.scaleOrdinal` with `schemeCategory10`, and an animated transition (`transition().duration(2000).delay(...)`) moves circles from the center to their data positions. The visualization is rendered as SVG, with axes drawn using `d3.axisBottom` and `d3.axisLeft`, and includes a legend showing species names.