This example displays migration to the United States from 14 countries as a bar chart, with each bar's height representing the number of migrants. The visualization is built using React and D3 v7, leveraging `d3.csvParse` to load data from a remote CSV file and `d3.scaleBand` and `d3.scaleLinear` to map country names and migrant counts to SVG rectangle coordinates. The chart renders bars as SVG `<rect>` elements, with axes implied by the scales but not explicitly drawn. Data loading is handled via a fetch promise, though the code currently logs parsed results instead of fully wiring them into the state.