This bar graph shows the top five countries by total COVID-19 deaths, using a horizontal layout with a red gridline and a labeled population axis. The React app fetches comma-separated data from a GitHub gist using d3.csv, then renders an SVG via d3.scaleBand for the y-axis, d3.scaleLinear for the x-axis, and d3.max for domain calculation, with d3.axisBottom and d3.axisLeft formatting ticks.