This visualization displays daily temperature readings for New York, San Francisco, and Austin as multi-line time series. Users can click any line to toggle its visibility, while hovering over a line dims the others to focus attention. The chart uses D3 v7 with SVG rendering, including scales, axes, and the d3.line generator with basis curves. It loads data from a TSV file via d3.tsv and implements interaction through event listeners on the SVG elements.