Answer:
<em>Hello, Freedmen's Bureau, (1865–72), during the Reconstruction period after the American Civil War, popular name for the U.S. Bureau of Refugees, Freedmen, and Abandoned Lands, established by Congress to provide practical aid to 4,000,000 newly freed African Americans in their transition from slavery to freedom. What role did freedmen play in Reconstruction governments? In reconstruction governments freedmen became sheriffs, mayors, and legislators. 16 Freedmen were elected to Congress between the years of 1869 and 1880.The Freedmen"s bureau helps to ensure that freed men had right. Hope That Helps!</em>
Answer:
Genetics
Continental drift
Explanation:
The genetics knowledge which is a library of traits serves as an information center which can be used to analyse evolution was not available to Darwin.
The knowledge of continents being a giant raft floating on molten rock that could fit into a puzzle was not available to Darwin that could solve the solve the existence of oddly similar terrestrial species on separate continents.
The construction of the Erie Canal.
<em>"New York’s geographical advantage was supplemented by the construction of the Erie Canal (1817–1825), and with the establishment of the Black Ball Line in 1818. While the Erie Canal connected the Hudson River to the Great Lakes and consequently to the fastest-growing parts of America west of the Appalachian Mountains, the Black Ball Line provided the first-ever regularly scheduled transatlantic passenger service. Both the Canal and the Line helped to solidify New York’s place as America’s center of commercial trade and central transportation hub."</em>
