Step 1: Track the circle across the three given frames.
In the first frame the circle sits in the middle row of the left column. In the second frame it has moved straight down by one row, still in the left column. In the third frame it has moved down by one more row, but since the grid has no row below the bottom one, it wraps around and reappears in the top row, again in the left column.
So the circle's rule is simple: it always stays in the left column, and it moves down by exactly one cell every frame, wrapping back to the top row whenever it runs past the bottom row.
Step 2: Track the triangle across the three given frames.
In the first frame the triangle is in the top row, at the rightmost column. In the second frame it has moved straight down by one row, staying in the rightmost column. In the third frame it has again moved down by one row, and this time it has also drifted one column to the left.
Reading the three frames together, the triangle moves down by one row every single frame without exception, and it drifts one column toward the left edge of the grid once it has gone as far right as it can go.
Step 3: Apply both rules to the missing (fourth) frame.
Continuing the circle's rule: from the top row (frame 3) it moves down by one row, landing back in the middle row, still in the left column.
Continuing the triangle's rule: from its frame-3 position it moves down by one row again, and keeps drifting toward the left column, since it is no longer pinned to the rightmost edge.
Step 4: Match this against the four options.
Only option (A) shows the circle back in the middle-left position with the triangle having moved further down and further left, exactly the positions the two separate rules predict.
Option (B) swaps the roles of the triangle and circle, which breaks the individual motion rule each shape has followed for three frames straight.
Option (C) places the circle inside the grid instead of along the left edge, which no frame in the given sequence ever shows.
Option (D) keeps the circle at the bottom-left, repeating the frame-2 position instead of advancing it by one more step.
Step 5: Final Answer.
Option (A) is the only figure consistent with both shapes' established one-step-per-frame movement.
\[ \boxed{\text{Option (A)}} \]
