False of plants . is defined studying animals
The answer would be Petrified Remains. This because the fossilization processes needs some remains to form in , some way before they can cast it.
There are no choices here, and there were MANY of goals that were not agreed to be accomplished
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.
