A scatter plot explores the Iris flower dataset, using dropdown menus to select which of four numeric measurements appears on each axis. The chart renders as an SVG with React components, where each circle represents a flower specimen. The visualization relies on `d3.scaleLinear` and `d3.extent` to map data values to pixel coordinates, while `ReactDropdown` manages user selections. Axis ticks are generated with `xScale.ticks()`, and tooltips display formatted values using `d3.format`.