What construction material did the Romans use most often in their engineering projects?
O concrete
mud
plaster
stone

c) troops march forward in close formation against newer, more accurate weapons

world war i began in 1914, after the assassination of archduke franz ferdinand, and lasted until 1918. during the conflict, germany, austria-hungary, bulgaria and the ottoman empire (the central powers) fought against great britain, france, russia, italy, romania, japan and the united states (the allied powers). to new military technologies and the horrors of trench warfare, world war i saw unprecedented levels of carnage and destruction. by the time the war was over and the allied powers claimed victory, more than 16 million people—soldiers and civilians alike—were dead.

explanation:

the phoenix dragon in the persian art reflect the alebrijes artistic styles

the manhattan project's indispensable man