The axis X - X is vertical and lies to the right of the figure, so the mirror image is the problem figure flipped left to right, with the same heights and the same line pattern. Observe the problem figure: a kite-shaped quadrilateral with a vertical and a horizontal diagonal, a long thin triangle attached at its lower left with its tip pointing left, a straight line from the tip of that triangle through the centre of the kite to the right corner, and a straight line from the left corner through the centre that ends as a short piece on the lower right edge. After reflection: the triangle moves to the lower right with its tip pointing right; the long line now runs from the tip of the triangle through the centre to the left corner; the line from the right corner through the centre now ends as a short piece on the lower left edge; the vertical and horizontal diagonals stay as they are. Option (1) has no short piece on the lower left edge. Option (3) has no line from the right corner to the centre. Option (4) has a stray short line on the lower right edge. Option (2) shows every line in its reflected position. Answer: (2) Option (2) figure
