This line chart displays temperature readings over time, using a smooth curved path and circular markers for each data point. The visualization is built with React and rendered as SVG, employing d3.scaleTime and d3.scaleLinear for axes, d3.line with curveNatural for the path, and d3.csv to load the San Francisco weekly temperature dataset from a GitHub gist. Tooltips appear on hover via SVG title elements, showing the formatted timestamp for each point.