This line chart displays one week of global temperatures across multiple cities, using colored lines to compare trends over time. The visualization uses D3 v5 with SVG rendering, employing `d3.nest` to group data by city and `d3.line` with `curveBasis` for smooth paths. Axes are generated via `d3.axisBottom` and `d3.axisLeft`, while a custom color legend maps city names using `d3.scaleOrdinal` with `schemeCategory10`. Temperature data is loaded from a CSV file sourced from Data Canvas - Sense Your City.