Step 1: Analyzing the Cube's Faces.
We are given different views of the cube. By examining the cube from multiple angles, we can determine the placement of the colors on the cube's faces. The black face is shown in one view, and based on the adjacent faces (red, green, etc.), we can deduce which color is on the opposite face.
Step 2: Conclusion.
The opposite face of black is yellow, as per the arrangement of colors on the cube.
\[
\boxed{\text{The correct answer is (b) Yellow.}}
\]