This bar chart displays the population of the top 10 countries for 2020, using horizontal bars sorted by country name. The chart is built with React and D3 v5, rendering SVG elements. The code defines custom `AxisBottom`, `AxisLeft`, and `Marks` components, using D3's `scaleBand` and `scaleLinear` for scales and `format` for tick labels. Data is loaded from a CSV URL using `d3.csv`, and population values are computed by multiplying the '2020' column by 1000.