Logic:
The matrix follows a simple subtraction pattern across each row:
$Box 1−Box 2=Box 3
- Row 1: 3 figures−1 figure=2 figures
- Row 2: 2 figures−1 figure=1 figure
- Row 3: 2 figures−2 figures=0 figures
Since 2−2=0, the missing box must be completely empty.