This example presents a responsive SVG area chart that compares the average height and lifespan of various tree species. It visualizes two distinct categories over a categorical species axis, using blue and orange filled regions to represent each metric. The chart loads CSV data from a GitHub gist and builds overlapping areas with D3’s `scaleBand`, `scaleLinear`, and `area` generators, while `axisBottom` and `axisLeft` render the axes. The visualization demonstrates asynchronous data loading via `csv` and D3 v7’s modular imports.