This line chart visualizes temperature variations over a week in San Francisco, with time on the x-axis and temperature on the y-axis. The chart uses a smooth curve via `d3.curveBasis` and displays gridlines through customized axes from `d3.axisBottom` and `d3.axisLeft`. Data is loaded from a CSV file and parsed with JavaScript's `Date` and numeric conversion. The visualization is rendered as SVG, with a title and axis labels styled using SVG text elements.