How did China's physical geography limit interactions between the Song Dynasty and other empires?
1) The physical geography of China made it difficult for the Song Dynasty to expand its territory.
2) The physical geography of China created natural barriers that made it challenging for other empires to invade.
3) The physical geography of China hindered trade and communication between the Song Dynasty and other empires.
4) The physical geography of China had no impact on interactions between the Song Dynasty and other empires.