I analyzed the board and noticed that in column 2 the opponent already has two X’s (at row 5 and row 4), meaning that if left unchallenged, they could build a vertical threat. By dropping my O in column 2, I block this potential while also placing my piece so that it contributes to two diagonal lines (one using the O at (0,5) and (1,4) and the other using the O’s at (4,5) and (3,4)). This move both defends and sets up future winning opportunities.