This interactive scatter plot visualizes the Iris flower dataset, showing measurements of sepal and petal length and width across three species. Users can dynamically select which measurement appears on the x-axis and y-axis using dropdown menus. The visualization uses D3.js v5 with SVG rendering, employing `scaleLinear` for axes, `scaleOrdinal` for color mapping, and `axisBottom` and `axisLeft` for ticks. The data is loaded via `d3.csv` and rendered as semi-transparent circles colored by species class.