A line chart displays temperature over time, with time on the x-axis and temperature on the y-axis. The chart uses React to render SVG elements, with D3 v5 providing scales, axis generation, and the line path via `d3.line()`. Data is loaded from a CSV file using `d3.csv`, and the x-axis is formatted with `timeFormat`. The visualization includes labeled axes, tick marks, and a smooth stroke line without individual data point circles.