Explanation:
composition of population means the distribution of the number of the population according to characteristics such as age,sex,marital status,socio-economic status. ... It helps to find out the structure of population. It helps to study on various demographic indicators
Because these men built some of the biggest industrial empires and pushed forward the industrialization of America.
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The lowell system was a labor and production model employed in the U.S. during the early years of the American textile industry in the early 19th century. The rhode island system refers to a system of mills, small villages and farms, ponds, dams, and spillways first developed by Samuel and John Slater.