This example visualizes the distribution of a single numeric variable using a histogram with 70 bins. The code loads data from a CSV file, applies d3.histogram to compute bin counts, and renders bars with d3.scaleLinear axes. Bars below a threshold of 140 are colored orange, while others are teal, with a dashed line and label marking the split. The visualization is built with d3.v4, rendered as SVG within a React framework, and uses d3.axisBottom and d3.axisLeft for the axes.