This line chart visualizes hourly temperature measurements in San Francisco, with time on the x-axis and temperature on the y-axis. The SVG rendering uses D3 v5’s `scaleTime`, `scaleLinear`, `axisBottom`, and `axisLeft` to build the axes, while the smooth curve is generated with `line()` and `curveBasis`. Data is loaded from a CSV via `csv`, with timestamps parsed as dates and temperatures as numbers before plotting.