This visualization displays multiple genomic variant trajectories over time, where each line represents a different genetic mutation and its expression value across temporal sampling points. The chart overlays several variants simultaneously, with each highlighted by circles at data points and a smooth curve connecting them via d3’s `curveNatural`. The code uses React with D3 v5 scales (`scaleLinear`) and axis components to render an SVG. Temperature data from a CSV provides the time series base layer, while genomic data from a separate JSON file supplies the variant-specific measurements.