This example tracks cumulative COVID-19 deaths over time using a line chart, loading data from a GitHub-hosted CSV via `d3.csv`. The React app initially renders a loading state and then displays the dataset. It uses React hooks (`useState`, `useEffect`) in `useData.js` to fetch and store the data, while `d3` handles parsing. The visualization is built to follow a YouTube tutorial, with the current code showing only a basic app shell that logs the fetched data to the console, leaving chart rendering for later steps.