Not all industries prospered in the Boom in the 1920s of America.
Old industries such as Coal and Cotton did terribly in the Boom as people became interested in the new products such as clothes made from artificial material(polyester). Coal was an old source of power, in the 1920s oil and electricity became greatly used.
Agriculture was also poor many farmers left the farmland to find work in the city. As new people emerged, new demands also appeared. Instead of fresh fruits and vegetables, Americans preferred cereals and bread which lead to the decrease of demands in fruits.
In the 1920s, Argentina and Canada began to supply the world crops which lead to the drops of demands from USA directly. Later in the year Prohibition(anything related to alcoholic drinks was made illegal) was introduced which caused an instant drop to the demands of barley(barley was used for making alcoholic drinks such as beer)
Answer:
The expansion of the African slave trade was a result of the demand for slaves in the colonial Americas.Tens of thousands of people were forcibly transported out of Africa to work on plantations, in mines and as domestic servants all over the Americas. The slave trade continued for hundreds of years, only ending in the nineteenth century. The slave trade increased because it was profitable. Those who controlled the trade - European slave-owners and traders, and African rulers and traders - benefited greatly from it. African rulers and traders were involved in the slave trade because selling slaves was a way to gain power and wealth.
Explanation:
