Which action is a direct cause of desertification?
(1) contaminating fresh water supplies
(2) burning fossil fuels in factories
(3) damming rivers to produce hydroelectricity
(4) removing vegetation through overgrazing

the section of the chart that represents a point at which a bill needs approval from a majority of people in both chambers to advance is j, as this is the only section before the bill becomes law which has both rows (symbolizing the chambers) converging into one, meaning that the two parts of the congress have to approve of it before it can march on with the process.