To benefit economically - this was particularly true with the sugar plantations in the Indies, which relied on slave labor in the triangular trade (slaves from africa, sugar from Americas, refined goods from Europe..)
After the British victory in the French and Indian War, the British taxed the colonies heavily to make up for war debt. The colonists thought this was unfair because they had never really asked to fight this war in the first place.
The United Nations pact of 1889
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Explanation: they didn't have the resources to and they just lost a somewhat large amount of forces in the previous battle against the soviet union
Answer:
Mostly money and promise of the American dream.
Many poor Europeans and other immigrants heard about the Americans and their lavish lives and wanted to try their luck and escape their poverty. However, they didn't have enough money to emigrate to America which is why they would become indentured servants.
This meant that they would sign a contract with their employer who would then pay for their travel expenses to America, and in turn they would have to work for them for a number of years in return for food and shelter. When the contract expired, ideally the indentured servant became free (although this didn't always happen). Their status was slightly better than that of a slave.
(Since you didn't give us any options, I can't tell you the exact answer).