This visualization demonstrates how marks and channels encode cereal data across three small multiples. It uses a scatterplot of sugars versus calories with manufacturer color, cereal type shape, and protein size, an area chart of average rating by sugar content, and bars of average sodium per shelf. The code loads cereal.csv with `d3.csv` and `d3.autoType`, then renders SVG charts using D3 v7 scales, axes, and shape generators.