This pie chart visualizes the distribution of total runs scored by each batting team from an IPL deliveries dataset. The chart aggregates data using `d3.rollup` and `d3.sum`, then renders slices with `d3.arc` and `d3.pie`, using `d3.schemeCategory10` for color encoding. Each slice is labeled with its team name, and the example demonstrates loading D3 via UNPKG alongside local ES6 modules, with both a standalone script and a reusable `piePlot` function that includes a legend.