Energy, which causes the built up pressure. :)
The development of small villages into the first cities was known as "<span>b. Urban revolution," although this should not be confused with a more modern term in which people congregate more in pre-existing cities. </span>
Answer:
The change in breastplates and helmets contribute to decline of the Roman Empire by weakening the the military. It weaken them because the removal of it promote laziness and negligence of training and the such. It also removes the protection against ranged weapons which caused many casualties.
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Hong Kong was gained during the Opium wars.
Answer:
All options are elements of civilization.
Explanation:
Civilization is the state of social culture, characterized by relative progress in the fields of science, religion, politics, the arts, means of expression, economic and scientific techniques, and a degree of refinement of customs. For this reason, we can conclude that all the options given in the question are elements of civilization, because all options show progress and a refinement of society.
