Answer:
Railroads used the iron to build railroad tracks but iron was weak and also dangerous. Soon people then realized that steel was a better material for tracks because it was able to hold more weight which then allowed heavier cargo. Railroads also transported mineral needed to forge steel.
Explanation:
I would say that it's B because it appears that the shape of Han China is based off of trade routes.
<span>The favorable environment and climate.
Hope this helps!</span>
Between the 9th century BCE and the 6th century BCE, the ancient Greek temples developed from the small mud brick structures into double-porched monumental "peripteral" buildings with colonnade on all sides, often reaching more than 20 metres in height (not including the roof).
