A world map visualizes the number of applicants from different countries over several years, with applicant counts shown at their geographic coordinates. The map uses a Mercator projection and renders country boundaries as SVG paths, with applicant locations marked as red points. Built with React and D3, the visualization loads world topology from a TopoJSON file and applicant data from a CSV, using `d3.json` and `d3.csv` for data loading and `d3.geoPath` with `d3.geoMercator` for geographic projection.