Explanation:In the chart, we can mark the points that represent 4X4 regions with number 1 to 4, and mark sub-points of point 1 with number 1-1 to 1-4, and so on and so forth. The corresponding positions of regions in the map and points in the chart are shown as below. 1-3, 1-4, 2-3 and 2-4 are marked in black in the chart, which means that the colour of these four 2X2 regions in the map is black. Only (B) satisfies this criteria.On the next page is shown the process of representing the map pieces in a chart according to the steps presented in the task. This allows you to know exactly why the map (B) is the correct answer. In this way, the space required to store the map information can be reduced.