Answer:
I believe that it is Oxygen and silicone
That is because earth spins towards the east.
Religious and ethnical problems.
It was one of the largest empires of the world with many different ethnicities. The problem was to unite people under one rule.
Another problem was communication. It was hard to transfer knowledge and news to all parts of the empire because it was too large.
It would take 12 years to move 1 ft (12 in = 1 ft) and <span>63,360 years for a mile. </span>
