I need to block my opponent's potential winning move. Currently, my opponent has X's at (0,2) and (1,1), forming a diagonal line that could win if they place their next X at (2,0). By placing my O at (2,0), I block this diagonal threat. Additionally, this move gives me an opportunity to create a winning strategy along column 0, as I already have an O at (0,0). If I can place my next move at (1,0), I would win. This move both defends against my opponent's immediate threat and sets up a potential winning line for me.