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.
<u>Answer:
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Once Earth-like planets are identified, the next step would be to check the habitability.
<u>Explanation:
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- Space exploration is meant to understand the outer celestial structures by developing and implementing space technologies. Once the objects are traced out, next step would be to check the habitability.
- This includes various features like climate, temperature, water composition, UV light etc. Ultra Violet radiations could help to start life on any planet as they are the building blocks of life.
Answer: Meteorite
Explanation:
The Appositive phrase is renaming the noun Meteorite.
