This bubble chart plots the relationship between February and March average temperatures. Each circle represents a year, with its x-position showing the February temperature and y-position showing the March temperature. The bubble’s radius scales with March temperature, while color encodes the Punxsutawney Phil prediction: red for “Full Shadow” and green for “No Shadow.” The visualization uses D3.js (v7) with SVG rendering, employing `d3.scaleLinear` for axes and radius, `d3.axisBottom` and `d3.axisLeft` for axes, and `d3.select` and `.enter()` to append circles. Data is drawn from the embedded `data.csv` subset covering years 2002–2007.