It was the refinement of the Bessemer process, first used in the United States in the 1860s, that allowed for the major advance in skyscraper construction. As steel is stronger and lighter in weight than iron, the use of a steel frame made possible the construction of truly tall buildings.
Answer:
it assured that they would be able to invade polond umproposed
Explanation:
<span>Albert Einstein became famous for the theory of relativity, which laid the basis for the release of atomic energy. </span>
Sorry but vile because he is bad person for murder
