This example visualizes historical Bitcoin price data, fetched live from the CoinDesk API. The visualization presents a line chart that users can interact with, powered by the open-source D3.js library and its `d3-selection-multi` extension for enhanced multi-point selection. Data is loaded asynchronously via `d3.json`, then processed and rendered within a React-based project structure. The chart displays the price trends over time, with the underlying HTML page and JavaScript files managing the data preparation and chart rendering.