The four pieces of a puzzle are shown in the figure below. Which one of the…

When the four black pieces are fitted into a square, the white notches in the pieces must combine to form the white figure. The two semicircular cutouts (one on the left piece and one on the top piece) must join edge-to-edge to produce the complete circular head. The triangular cutouts must form the long pointed beak and the small indentation on the body, and the 45° slanted edges of the pieces must produce the slanted sides of the body. Checking the candidates: the head must be a full circle (not a crescent), the beak must be the long thin triangle, and the body must be a diamond whose sides match the slanted piece edges, with the small notch on its upper-right side. Only figure P satisfies all of these conditions simultaneously, so P is the figure that can be constructed from the four pieces without overlaps.