This bubble chart displays the population of each U.S. state, with circles positioned along an x-axis of state names and a y-axis of population, while the circle size also encodes population and the color represents the state capital. The visualization uses SVG and animation, with interactive tooltips that appear on mouseover, showing the capital and population values. Built with D3 v7, the chart employs `d3.scaleBand`, `d3.scaleLinear`, and `d3.scaleOrdinal` for its scales, and renders data from a CSV file loaded via `d3.csv`, with a custom legend below the chart.