This line chart displays one week of temperature data from cities around the world, sourced from Data Canvas - Sense Your City. Each smooth, colored line represents a different city’s temperature over time, with an ordinal color scale and a legend function defined in a separate module. The visualization uses D3 v5’s `csv`, `scaleTime`, `scaleLinear`, `line` with `curveBasis`, and `nest` to group data by city. The SVG rendering includes axis labels, a title, and gridlines styled via CSS.