A bubble chart displays culmen length versus culmen depth for three penguin species, with bubble size encoding flipper length and color indicating species. Data is loaded from a CSV file. The visualization, rendered as SVG with animation, uses D3.js v7 APIs including `d3.scaleLinear`, `d3.scaleOrdinal`, `d3.axisBottom`, `d3.axisLeft`, and `d3.interpolateTurbo` for color mapping. Interactive tooltips appear on mouseover, and a legend identifies species colors.