A bar chart displays population values for categorical X-axis entries, with bars extending upward from a baseline. The visualization uses D3 v5's `scaleBand` for the X axis, `scaleLinear` for the Y axis, and renders SVG rectangles with a steelblue fill. Data loads from a CSV file via `d3.csv`, with population values converted to thousands. Grid lines use `d3.axisBottom` and `d3.axisLeft` with custom tick formatting that abbreviates large numbers (e.g., "B" for billions), and the chart is built within a React-compatible HTML page.