Answer:
Chinese historians have spent well over a thousand years trying to understand why the Han Dynasty collapsed. Over time they developed three main theories: 1) bad rulers; 2) the influence of empresses and court eunuchs over child emperors too young to rule by themselves; and 3) the Yellow Turban Revolt.
Explanation:
Answer:
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They made everything more easier. It was possible for them to carry large loads of resources from all over the world back to manufacturing plants in England, for example. They were also sturdy and lasted longer than ships made out of wood, and they could also use fuels to go instead of wind which meant that they could go faster and safer.