I’m choosing a move that immediately sets up a win threat. With our O already in the top‐left corner (0,0), our only winning lines are row 0 and column 0. By placing an O in the bottom left corner (2,0), we complete part of the left column, threatening to win by placing an O at (1,0) on the next turn. This forces our opponent to block and positions us to create further threats (or a fork) later on. It’s the most forcing move given the current board.