This smoothed radar chart compares three mobile phone brands—iPhone, Samsung, and Nokia—across eight criteria such as battery life, brand, and price. For each brand, a closed polygon is drawn using `d3.scaleLinear` for the radial axis and smooth, cardinal-closed paths (`roundStrokes: true`). The SVG is generated with D3.js v5, colored via `d3.scaleOrdinal` with a custom range, and includes interactive hover effects and an animated legend.