This bubble chart visualizes bee colony loss across four U.S. states from 2019 to 2021, plotting starting colony counts on the y-axis against time quarters on the x-axis. Each bubble’s size encodes the percentage of colonies lost, while its color distinguishes the state, with legends showing both scales. The visualization is built with D3 v7 and the d3-legend extension, using SVG rendering. Data is loaded from a CSV file via `d3.csv`, with axes created using `d3.scaleBand`, `d3.scaleLinear`, and `d3.axisBottom`/`d3.axisLeft`.