This line chart visualizes one week of temperature data in San Francisco using a smooth, red curved line plotted over a Cartesian grid. The SVG rendering is built with D3 v5, using `scaleTime` and `scaleLinear` for the axes, `line` with `curveBasis` for the path, and `axisBottom` and `axisLeft` for ticks. Data is loaded from a CSV of timestamp-temperature pairs, with annotations for “Time” and “Temperature” and a title.