The chart displays the cumulative global death toll from COVID-19 over time as a single black line, with a horizontal marker line indicating the 10,000-death threshold. Built with React and D3 v7, it uses `scaleTime` and `scaleLinear` to map dates and totals, while a `line` generator produces the SVG path. The data is fetched from the CSSE COVID-19 time series CSV, aggregated daily by summing deaths across all countries.