I'm placing my "O" at position (2,0) for two strategic reasons:

1. Offensive strategy: This creates a potential winning opportunity for me along the left vertical column. I already have an "O" at (0,0), and now with an "O" at (2,0), I'll be one move away from completing a vertical line.

2. Defensive consideration: My opponent has "X" marks at (0,1), (2,1), and (2,2). While they don't have an immediate winning move, placing my "O" at (2,0) strengthens my board position while maintaining control of key spaces.

This move gives me the best chance to set up a winning strategy while not allowing my opponent to create an immediate threat.