A line chart displays the cumulative global death toll from COVID-19 over time, using a linear y-axis that starts at zero. The chart emphasizes the steep, near-exponential growth of deaths by avoiding a logarithmic scale. The visualization loads data from the Johns Hopkins Coronavirus dataset via `d3.csv` and renders an SVG path generated by `d3.line` with `d3.scaleTime` and `d3.scaleLinear` axes. The React component uses `d3.axisBottom` and `d3.axisLeft` for ticks and gridlines.