a) hunter gatherers who built mounds
The various cultures collectively termed "Mound Builders" were inhabitants of North America who, during a circa 5,000-year period, constructed various styles of earthen mounds for religious, ceremonial, burial, and elite residential purposes.
Explanation:
Malcolm X was born on May 19, 1925.
He was assassinated by a member of the Nation of Islam on February 21, 1965 in the Audubon Ballroom.
The Industrial Revolution, which was the transition from hand production methods to machines occurred in Europe and the US between 1820 and 1840, brought as result the use new chemical and iron production processes, the use of steam power, the development of machine tools as well as the rise of the factory system.
The effects of this Industrial Revolution were notable in Northwest of America, specifically in Boston, New York City, and Philadelphia, where such industrial development transformed them into industrial cities and growing commercial centers.
<em>Some of the features which showed that such Northwest cities were becoming an urban society were the dense network of railroads, canals present in them as well as the telegraph network which linked the nation economically.
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