Hoover Dam<span>, once known as Boulder Dam, is a concrete arch-gravity dam </span>in<span> the Black Canyon ....</span>Construction<span> of a rail line joining Las Vegas and the dam site began </span>in<span> September </span>1930<span>. .... Falling objects were the most common cause of death on the dam site; the highscalers' work thus </span>helped<span>ensure</span><span> worker safety</span>
The answer to number 2 is D) Paul Revere. I dont know the other two
He Moved around and taught about the ideas about Greek culture.
The Bessemer Process was an extremely important invention because it helped made stronger rails for constructing the railroads and helped to make stronger metal machines and innovative architectural structures like skyscrapers. The United States Industrial Revolution moved from the Age of Iron to the Age of Steel.
