Answer:
Most people associate slavery with the American South. However, slaves were utilized in the Caribbean, as well as in all parts of the original colonies and territories that later became the United States. From the time Christopher Columbus (1451–1506) arrived in the Caribbean in 1492, Caribbean Indians were enslaved to work in mines and on plantations. Later, the Spanish began importing African slaves to work the sugar plantations. Because sugar crops required quick processing to avoid spoilage, Caribbean slave life was much harsher than that of slaves in North America. Nineteen-hour days and harsh working conditions led to disease and high death rates. Rather than improve conditions, plantation owners simply increased the number of slaves they imported.
Neither one of the sides were fruitful in getting through the resistance of the other and bringing about a stalemate. Trench fighting developed due the disappointment of the Schliffen Plan. It was another arrangement of fighting which was an immediate reason for the stalemate, and this is the reason. It was an arrangement of resistance not offense.
The event or incident that triggered long standing tensions in Europe and was the immediate cause of ww1 was the assasination of archduke Ferdinard and his wife sophie, in sarajavo by a Bosnian student.
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Push factors were ; few jobs, overpopulation, war, natural disasters. Pull factors were ; jobs, safety, better quality of life