A box plot visualizes the distribution of HP values for Pokémon, displaying the minimum, first quartile, median, third quartile, and maximum as horizontal line segments connected by whiskers. The chart uses the p5.js library within a single sketch, loading Pokémon statistics from a CSV file via the `loadTable` function. Data is sorted, quartiles are computed manually, and the plot is drawn on a 500-by-700 canvas with a background grid, axis labels, and rotated text for the y-axis label.