e pattern in the question goes like this: the shaded area has the largest number ofsides.The first row has two rectangles and a triangle. The largest number of sides is rectangle.Hence the shaded area for the first row has rectangle.The second row has a pentagon as the largest number of sides. So the shaded area forthe second row has a pentagon.The third row has an octagon shape as the largest number of sides. So, the shaded areafor the third row must be an hexagon.The fourth row has a rectangle as the largest number of sides. So, the shaded are for thefourth row is rectangle.