This example visualizes country-wise Amazon costs using a pie chart, displaying the top 10 countries by cost with color-coded slices and a legend listing each country’s cost in dollars. The chart is rendered as SVG using D3 v5, with `d3.pie()` to compute arc angles, `d3.arc()` to generate path segments, and `d3.scaleOrdinal()` with `schemeCategory10` for colors. Data is loaded from a CSV hosted on GitHub Gist and sorted before rendering. Interactive mouseover events log the selected country’s cost to the console.