A line chart displays total global COVID-19 deaths over time, sourced from the CSSE COVID-19 dataset. The React component renders an SVG with `d3.scaleTime` and `d3.scaleLinear` axes, while `d3.axisBottom` generates the x-axis gridlines. A vertical marker indicates the most recent date, and a horizontal marker highlights the 10,000-death threshold, both styled with CSS classes.