The correct answer to this open question is the following.
The era of the Han and Song Dynasty was an age of inventions and discoveries that led to economic growth and development. Explain how 3 inventions or discoveries had an impact on either the economics or development of Imperial China.
Well, the three inventions that I am going to choose is gunpowder, the compass, and Printing.
Gunpowder changed the way ancient China waged war. The use of gunpowder made the Chinese army very powerful. Gunpowder represented a considerable advantage over the enemies. The compass served as a magnificent tool for explorers and the military that years later also helped merchants to trade their goods throughout other far lands.
Printing also had an important impact to record history and events that could remain through the pass of time.
When these dynasties sold and traded gunpowder, it represented great profit for merchants. The compass allowed these merchants to travel far distances to sell their products, generating more profits for China.