This example visualizes Gapminder population growth data, plotting total population against year for each country as circles with tooltips showing country names. Built with React and D3 v5, it uses `scaleLinear` for both axes, `scaleOrdinal` for color encoding, and `format` to abbreviate population labels. The SVG rendering includes custom `AxisBottom` and `AxisLeft` components that generate ticks, while `Marks` generates circles with D3’s `interpolateRainbow` color scheme. The data is loaded asynchronously from a CSV via `useData` and D3’s `csv` parser.