This example displays a horizontal bar chart of the top 20 countries by population, sourced from a CSV dataset. The visualization uses React and D3 v5, with SVG rendering. The code implements `d3.scaleBand` for the y-axis categories and `d3.scaleLinear` for the x-axis population values, drawing gridlines and axis ticks manually. The bars are rendered as `rect` elements with widths proportional to each country's population.