We have three blocks. We call them A, B and C. Block A contains a medium blue square. A medium yellow square is touching the bottom edge of this block. This shape is below the medium blue square. Above block A is block B which contains one medium yellow square and a medium black square. The medium yellow square is touching the bottom edge of this block. It is below the medium black square. Finally, there is block C. It is to the left of block B. It has three medium black squares. Medium black square number one is touching the bottom edge of this block. Medium black square number two is below medium black square number three. Below the black object which is below medium black square number three is medium black square number one. It is below medium black square number three.
What is below the blue thing? a medium black square that is touching the bottom edge of a block or a medium black square number three?
medium black square  that is touching the bottom edge of a block  medium black square  number three both of them none of them