A bar chart displays absolute frequencies for six German school-grade categories. The chart uses D3 v5 to render SVG rectangles, with axes, gridlines, and a tooltip that appears on mouse hover. Animated transitions widen the hovered bar while dimming others. The y-axis is linear, and the x-axis uses a band scale. The code applies D3's scaleBand, scaleLinear, axisLeft, and axisBottom, with custom styling for labels and grid lines. Data is hardcoded in the script.