This visualization displays a week of temperature readings in San Francisco as a smooth red line chart. The code loads CSV data using `d3.csv`, parses timestamps and temperature values, then renders an SVG line chart with `d3.line` and a basis curve. Time and linear scales (`d3.scaleTime`, `d3.scaleLinear`) map data to axes, with labeled axes and gridlines generated via `d3.axisBottom` and `d3.axisLeft`. The chart emphasizes temporal trends through a clear title and stylized tick marks.