The mirror line X - X is vertical and lies to the right of the figure, so the mirror image is obtained by interchanging left and right (lateral inversion), while top and bottom remain the same. In the problem figure the zigzag line starts at the top-right corner, goes down-left to a bend, then down to the bottom right, and then runs left and right in a Z-shaped path that ends at the top-left corner. Another line comes from the top edge, goes down to a joint, then down-left to the bottom-left corner, while a branch from the joint goes to the right edge. A separate straight line starts at a crossing and ends on the bottom edge. After the flip, the zigzag starts at the top-left corner, passes the bend and goes down to the bottom-left, and the line from the top edge goes down to a joint and then down-right to the bottom-right corner, with a branch from the joint to the left edge. The straight line from the crossing meets the bottom edge towards the left of the centre. Option (1) has an extra vertical line, option (3) has an additional line from the top edge, and option (4) has an extra diagonal line joining the bottom-left vertex. Only option (2) shows all lines correctly. Answer: (2) the second answer figure
