During the Song Dynasty the invention of increased the speed

The Song Dynasty invented superior shipbuilding methods and the compass which helped increase the speed of transportation.

Explanation:

Although the Song Dynasty is well known for many of their incredible inventions, their advancements in transportation are truly remarkable. They used massive oars and sails large enough to power huge ships. They also created ship rudders used to steer boats in specific directions. The compass helped shipmasters get from location to location faster with a more accurate way of transporting. This led to several benefits as goods, ideas, and cultures were now able to spread faster. Their inventions both connected and changed the world!

he sent troops to protect the students as they entered the school.

6 pounds is equivalent to 92 ounces.

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