We have two blocks. Lets call them A and B. Block A is below B. Block A contains one small blue square and one small black square. It also contains one big blue circle. It is to the left of the small black square. To the left of the small black square is the small blue square. This object is touching the bottom edge of this block. It is below the big blue circle. Block B has one medium blue square and one medium black triangle. The medium blue square is to the left of and above the medium black triangle.
What is to the left of the small black square? a small blue square that is touching the bottom edge of a block or a medium black triangle?
small blue square  that is touching the bottom edge of a block  medium black triangle  both of them none of them