We have three blocks, A, B and C. Block A has one medium black square and a medium blue square. The medium black square is touching the bottom edge of this block. It is below the medium blue square. Then, there is block B which has a medium blue square and a medium yellow square. Below the medium yellow square is the medium blue square. Finally, above block B we have block C which is below block A. It contains one medium blue square.
Which object is below a medium blue square? the medium black square that is touching the bottom edge of a block or the yellow object?
the medium black square  that is touching the bottom edge of a block  the yellow object both of them none of them