Rural- relating to, or characteristic of the country side rather than the town. For a more simple definition it's basically people who live out in the country side. Example- She lives in a rural area.
A block mountain is a mountain that is formed by the fault blocks of rocks that are sometimes hundreds of kilometers. They are created by tectonic events. Where the large areas of bedrocks are disputed by the faults.
- A blue mounting is a range of mountains in Jamaica.
- These mountains are characterized by a uniform type of lithology. The se are forced by the lifting of the faults and an indicator of the external tectonic activity.
Hence the option A is correct.
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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.