This chart displays the total number of COVID-19 deaths in the United States over time as a black line on a yellow background. It uses React and D3 v5 scales, including `scaleTime` and `scaleLinear`, with a `line` generator to plot the data from the CSSE COVID-19 time series. A horizontal marker line at 900,000 deaths and a corresponding label are drawn using SVG elements within the chart’s margin-based layout.