This pie chart visualizes the distribution of smartphone categories from a CSV dataset. The visualization uses D3.js (v7) to compute slice arcs with `d3.pie()` and renders them as SVG paths using `d3.arc()`. A color scale from `d3.scaleOrdinal(d3.schemeTableau10)` distinguishes categories, while a legend and axis labels clarify the data. The chart also includes tooltips with category names and counts.