This bar chart visualizes total rainfall in Ecuador from 1940 to 1950, with each bar representing a year’s precipitation in millimeters. The chart uses D3 v7 to load CSV data from a Gist, scales the values with d3.scaleBand for the x-axis and d3.scaleLinear for the y-axis, and renders axes with d3.axisBottom and d3.axisLeft. Bars are drawn as SVG rectangles with a light blue fill, styled via a linked CSS file, and the layout includes margins, a title, and rotated axis labels.