This example shows global cumulative COVID-19 deaths over time as a line chart, with a logarithmic y-axis and a marker line highlighting the one-million-death threshold. The chart is rendered as SVG using React components that wrap D3 scales and axis generators, including `d3.scaleLog`, `d3.scaleTime`, and `d3.axisBottom`/`axisLeft`. Data is fetched from a CSV file via `d3.csv` and processed with `d3.timeParse` and array reduction. The visualization pairs React’s declarative component structure with D3’s data manipulation and layout utilities.