This example displays a scatterplot of car horsepower versus weight from the auto-mpg dataset, rendered as red circles on an SVG canvas. A dropdown menu at the top offers options A, B, and C, though no filtering logic is implemented. The visualization uses d3.scaleLinear for both axes, d3.axisBottom and d3.axisLeft for ticks, and d3.csv to load data, with axis labels and a title styled via CSS.