Explanation:

- Option 1 (7): Field hockey is not played with 7 players per team. This number is more common in games like seven-a-side hockey, which is a modified version.

- Option 2 (11): Correct Answer. In standard field hockey, each team consists of 11 players. This includes 10 field players and 1 goalkeeper.

- Option 3 (15): 15 players per team is not standard in field hockey.

- Option 4 (19): 19 players per team is never the case for on-field play. Squads might be large in tournaments, but only 11 play at a time.