This visualization shows the evolution of temperature in San Francisco over time with a line chart. The data is loaded from a CSV file using `d3.csv`, with timestamps parsed as dates and temperatures as numbers. The chart uses `d3.scaleTime` and `d3.scaleLinear` to map data to SVG coordinates, `d3.axisLeft` and `d3.axisBottom` for labeled axes with white gridlines, and `d3.line` with `curveBasis` to draw a smooth yellow path.