The pattern in the diagram involves an incremental increase of one circle in each row from top to bottom, accurately described by Option A.
Option A, "Each row increases by 1 circle," accurately describes the pattern in the diagram as you move from the top to the bottom row. In this sequence, each subsequent row adds one additional circle compared to the preceding row.
This consistent increment creates a linear progression, where the number of circles in each row forms a simple arithmetic sequence. The statement in Option A aptly captures this regularity, highlighting the incremental growth by one circle in each successive row. This pattern continues, providing a clear and straightforward description of the progression observed in the diagram.