Placing my piece in column 1 creates a vertical line of three O's at positions (1,0), (1,1), and (1,2). Since my opponent cannot block position (1,3) in their next move (because pieces drop to the lowest available position), I am setting up a guaranteed win in my next turn unless they find a way to win first. After analyzing all columns, this move creates the strongest threat while not enabling any immediate win for my opponent.