This bar chart displays COVID-19 data for fifteen countries, ranking them by basic cost. The visualization uses React to manage state and render SVG elements, while D3 v5 provides scales, axes, and data loading via `d3.csv`. Marks are drawn as bars using `rect` elements, with `d3.scaleBand` for the y-axis and `d3.scaleLinear` for the x-axis. The chart loads data from a CSV file hosted on GitHub.