This stylized bar chart displays the top 10 most populous countries from the United Nations World Population Prospects 2019 dataset, with each bar’s length representing population. The visualization uses React components and D3.js APIs, including `scaleBand` for the categorical y-axis, `scaleLinear` for the numeric x-axis, and SVG `<rect>` elements for the bars. The y-axis lists country names, while the x-axis uses a custom SI formatter (replacing 'G' with 'B') to display population in billions. The chart’s aesthetic styling—Poppins font, teal bar color, and muted grid lines—enhances readability.