This visualization compares five countries—Indonesia, Japan, China, Vietnam, and South Korea—across selectable factors such as unemployment, marriage rates, household prices, and elderly population. Using D3.js v3 and React, it renders animated multi-line SVG charts where users switch factors via a dropdown and toggle country visibility with checkboxes. The code explicitly maps country lines to colors, scales the y-axis dynamically with `d3.svg.axis`, and reads from a CSV file with yearly values.