The statement is True. According to the context, a histogram is a set of rectangles with areas proportional to the class frequency. Since the height of rectangles in a histogram (for equal class intervals) or the area (for unequal class intervals) represents the frequency of each class, the rectangle with the maximum height/area corresponds to the class having the highest frequency, i.e., the modal class. The exact value of mode can be determined graphically by drawing lines from the top corners of the tallest rectangle to the top corners of adjacent rectangles. The intersection point of these lines, when dropped to the X-axis, gives the modal value. Thus, histogram serves as a graphical tool for determining the mode of a frequency distribution.