A bar chart displays sales figures for individual salespeople, with each bar’s height proportional to the numeric value in the `sales.csv` dataset. The visualization uses D3 v4’s `scaleBand` for the categorical x-axis, `scaleLinear` for the y-axis, and `d3.axisBottom` and `d3.axisLeft` for tick marks. Bars are rendered as SVG rectangles, colored steelblue via a CSS class, within a React-compatible HTML page.