Answer:
The answer is concrete
Explanation:
Ancient Roman concrete was a mixture of lime mortar, aggregate, pozzolana, water, and stones, and was stronger than previously-used concretes. The ancient builders placed these ingredients in wooden frames where they hardened and bonded to a facing of stones or (more frequently) bricks.
Answer:n cartography, a map projection is a way to flatten a globe's surface into a plane in order to ... Every distinct map projection distorts in a distinct way, by definition. ... the name's literal meaning, projection is not limited to perspective projections, such ... A fundamental projection classification is based on the type of projection ...
Explanation:
The Bureau of Refugees, Freedmen, and Abandoned Lands, usually referred to as simply the Freedmen's Bureau, was a U.S. federal government agency established in 1865 to aid freedmen<span> (freed slaves) in the South during the Reconstruction era of the United States, which attempted to change society in the former Confederacy .
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