Looking at the board:
 O | X | O
 -----------
 . | X | .
 -----------
 . | O | X

I need to block my opponent from winning. If they place an O at position 2,0, they would complete a vertical line in the left column (O-.-.), winning the game. 

Additionally, by placing my X at 2,0, I'm setting up a potential diagonal winning opportunity, as I would have Xs at positions 2,0, 1,1, and possibly 0,2 in the future if I get another turn. This position also blocks a potential horizontal win for my opponent if they were to place Os at both 2,0 and 1,0.

While I don't have an immediate winning move available, blocking the opponent's win is the priority, and 2,0 is strategically the best move for both defense and creating future winning possibilities.