This example displays a bar chart of four individuals’ scores, with blue bars representing values on a scale from 0 to 100. It uses D3 v7 to create an SVG graphic, employing the `d3.select` method to append the chart to the page, `d3.scaleBand` and `d3.scaleLinear` to map data to x and y coordinates, and the `join` operation to bind each data point to a rectangle element. The chart’s dimensions and margins are fixed, and the data is hard-coded in the script.