This bar chart displays the 2020 population for 30 countries, using horizontal bars where length encodes the population value. The visualization is rendered as an SVG with React, using D3 version 5's `scaleBand` for the categorical y-axis of country names and `scaleLinear` for the numeric x-axis. Population data is loaded from a CSV file hosted on GitHub via D3's `csv` function. The axes are custom components (`AxisBottom`, `AxisLeft`), while the bars themselves are `rect` elements created in the `Marks` component.