This bar chart visualization displays population counts for five countries—USA, China, India, Indonesia, and Pakistan—using vertically oriented rectangular bars. The chart uses D3.js v7 with React-compatible SVG rendering, employing `d3.scaleBand` for the categorical country axis and `d3.scaleLinear` for the population values. Bars are styled with a steel blue fill that changes to orange on hover, while rotated country labels on the x-axis improve readability. The visualization includes both axes with tick marks and clear axis labels for country and population.