I'm choosing column 4 for several strategic reasons. First, it blocks my opponent from building vertically in that column where they already have a piece. Second, it creates potential for future horizontal connections with my existing pieces in columns 2 and 3. Third, it helps me establish control in the center of the board, which typically offers more winning opportunities. While I don't have an immediate winning move available, and my opponent doesn't have an immediate threat I need to block, placing in column 4 gives me the best positioning for future moves.