Answer:
African Americans
Explanation:
In the middle of the century, northern manufacturing extended the use of power-driven machines to a wider range of commodities. Agricultural mechanization throughout the 20th century led to dramatic shifts in farming. Tractors, combines, harvesters, and other farming equipment are helping farmers grow more.
Orogressive movement of Africans Americans northward starting at the beginning of the twentieth century was a result of economic boom in the this areas, they had to migrate and find jobs that can feed them and their families.
Stamp tax
This was required following the enactment of the Stamp Act by the British Parliament in 1765. The stamp tax was imposed on all American colonists and required them to pay a tax on every piece of printed paper used in the colonies
The gold rush brought many changes to California like: commercial boom, population increase, immigration into the union, new machinery, and transportation and agriculture.
I would say a tangible way the government helps us is by providing homes for the homeless or maybe cleaning up a local park or street. And another way is by providing us with mass transportation.