This bar chart shows the relationship between students' self-reported stress levels and their average grades, with the data grouped into Low, Medium, and High stress categories. The chart uses D3 v7 to load a CSV file, group the data with `d3.group`, and calculate means with `d3.mean`. Axes are generated using `d3.axisBottom` and `d3.axisLeft`, while bars are rendered as SVG rectangles that change color on hover.