Answer: Piece 7 is the correct answer. Why? The piece has to contain a triangle, because all the complete rows and columns contain one rectangle, square and triangle. So that eliminates choices 3, 4 and 5. The piece has to contain a flat yellow oval, because the row it is in contains other pieces with flat yellow ovals. So that eliminates pieces 4, 6 and 8, leaving 1, 2 and 7. The piece also has to have a flat yellow oval at the bottom, because the row already contains pieces with flat yellow ovals at the top and middle. That eliminates choice 1. The triangle also has to be tall and wide, because the other shapes in the row are tall and wide. That eliminates choice 2, leaving choice 7 as the correct answer.