We have three blocks. We call them A, B and C. Block A has one medium yellow square and a medium blue square. The medium yellow square is below the medium blue square. Above block A there is block B with a medium black square in it. It also contains one medium yellow square. The medium yellow square is below the medium black square. Above block A there is block C. It contains a medium black square.
Which object is below a medium black square? the medium yellow square that is touching the bottom edge of a block or the blue thing?
the medium yellow square  that is touching the bottom edge of a block  the blue thing both of them none of them