A line chart tracks cumulative global COVID-19 deaths over time, using data from the Johns Hopkins Coronavirus Dataset. The visualization highlights two reference markers: a horizontal line at 10,000 deaths and a vertical line at the most recent date. Built with React and D3 v5, it uses `scaleTime`, `scaleLinear`, and `line` to generate the SVG path. Axes are rendered via `axisBottom`, with custom marker components drawing labeled guide lines.