Concept:This is a flow-line map that illustrates the movement of passengers between IZABU town and the surrounding towns.Explanation:The lines on the figure show the direction of passenger traffic to and from IZABU town.The scale states that 1 line represents 1,500 persons, so the number of lines indicates the passenger volume.Thus, the figure gives both quantitative and directional information at the same time.This combined presentation is its main advantage.Answer:B. shows quantity and direction together
