This example visualizes the number of Shark Tank deals per U.S. state using a chloropleth map. Each state is colored on a white-to-green scale based on deal count, with a legend showing the mapping up to 100 deals. The map uses d3.geoMercator and d3.geoPath to render state boundaries from GeoJSON data, while a tooltip displays the state name and entrepreneur count on hover. The code employs d3.scaleLinear for color encoding and transitions to animate fill changes on mouseleave.