Position (2,1) is the optimal move because:
1. It builds a potential winning line in the bottom row (2,0)-(2,1)-(2,2)
2. It also creates a potential winning line in the middle column (0,1)-(1,1)-(2,1)
3. This gives me two possible ways to win on my next turn, forcing my opponent to block in only one direction
4. Additionally, this move doesn't allow my opponent to create an immediate winning opportunity

Playing (1,2) would be defensive to block my opponent's potential win in the middle row, but position (2,1) creates a "fork" scenario where I'll have two ways to win, which is a stronger strategic position.