This example demonstrates interactive box plots that visualize the distribution of selected numeric columns, optionally grouped by a categorical variable through dropdown menus. It shows quartiles, medians, and outliers, with tooltips revealing exact values on hover. The visualization is built with React and D3 v5, using `d3.nest()` to compute summary statistics and `d3.scaleLinear` for the y-axis. Rendered as SVG with animated transitions, box plots and outlier circles respond to mouse events, highlighting the interquartile range while dimming others.