This visualization displays temperature readings from multiple cities over a one-week period, with each city represented by a distinct colored line. The chart uses D3 v5’s `scaleTime` and `scaleLinear` for axes, `line` with `curveBasis` for smooth paths, and `nest` to group data by city. A custom `colorLegend` component renders ordinal color categories, while axis labels and a title annotate the SVG output. The data is loaded from a CSV hosted on VizHub.