This bar chart displays the number of students for various grades and locations, with bars colored blue and axes labeled "Grades" and "Num_students." The visualization uses D3.js v6 to create an SVG rendering, employing `d3.scaleBand` for the categorical x-axis and `d3.scaleLinear` for the numeric y-axis. Data is hardcoded in an array of objects, while axes are generated with `d3.axisLeft` and `d3.axisBottom`. The chart includes a pink background rectangle and console logs for debugging scale behavior.