This vertical bar chart displays population data for ten countries, using D3 v6 (d3.scaleBand, d3.scaleLinear, d3.axisLeft, d3.axisBottom) and SVG rendering. The bars, initially steelblue, turn red with a blue stroke and show a text label with the population count (formatted using d3.format) on mouseover, which disappears on mouseout. The chart’s dimensions adapt to the window size, and a custom format-india function is available for Indian number formatting, though not used in the main rendering.