This bar chart visualizes savings growth across age groups, from age 20 to 38, with each bar representing savings in dollars. Built with D3 v5, the visualization renders as an SVG with interactive hover effects that highlight the selected bar and display the difference between that bar and all others. The chart uses D3's scaleBand and scaleLinear for the axes, with animated transitions on mouse enter and leave events to alter bar opacity, position, and width.