Answer:
Gunpowder
Step-by-step explanation:
Gunpowder was the contribution from the Song dynasty that changed the future of warfare. The Song dynasty in China was the first to develop gunpowder, which they initially used for fireworks and later for military purposes. By the 14th century, guns were widely used in warfare, and gunpowder had revolutionized the way wars were fought. The use of gunpowder led to the development of new weapons such as cannons, muskets, and rifles, which changed the nature of warfare and made armor obsolete. It also changed the balance of power between different military forces, enabling smaller armies to defeat larger ones. Therefore, gunpowder was a significant contribution from the Song dynasty that changed the future of warfare.