Explanation: (D) Total volume of the piece of wood = \(3 \times 3 \times 2 = 18 \text{ cm}^3\). The piece is divided into 18 identical cubes. Volume of each small cube = \(\frac{18}{18} = 1 \text{ cm}^3\). Since the cube is square-shaped, the side length \(a\) of each small cube is \(\sqrt[3]{1} = 1 \text{ cm}\). Surface area of one small cube = \(6a^2 = 6 \cdot 1^2 = 6 \text{ cm}^2\). Total surface area of 18 identical cubes = \(18 \times 6 = 108 \text{ cm}^2\).
