This example shows temperature trends over time for multiple cities, with each city represented as a colored line and sorted by its final value. The visualization uses d3.line with curveBasis for smooth paths, d3.scaleTime and d3.scaleLinear for axes, and d3.scaleOrdinal with schemeCategory10 for city colors. A custom colorLegend component renders the legend, while d3.nest groups the CSV data by city. The SVG rendering includes grid lines via axis tick sizing and a mix-blend-mode for overlapping lines.