A React and D3 v5 bar chart displays the top 10 most populous countries from United Nations World Population Prospects 2019 data. It shows rectangular bars of varying widths representing each country’s 2020 population, computed via `d3.scaleLinear` and positioned with `d3.scaleBand`. No axes or labels are drawn, creating a minimal, "pathetic" chart. The SVG rendering uses React components, with data loaded asynchronously via `d3.csv`, and the chart updates only after the dataset is fully fetched.