Aslave-trade cycle initiated by ship-owners was known as:

slave buying
the atlantic triangle
hiring out
the force act

The correct option is "the Atlantic Triangle"

The Atlantic slave trade, also known as the transatlantic slave trade, refers to the slave trade that took place across the Atlantic Ocean between the 16th and 19th centuries. The vast majority of the slaves involved in Atlantic trade were Africans from the central and western parts of the continent, mostly prisoners of the wars between rival ethnic groups that were sold by African slave traders to European buyers, who transported them to their colonies in North and South America. There, the slaves were forced to work in the plantations of coffee, coconut, tobacco and cotton, in the gold and silver mines, in the rice fields, in the construction industry, in the wood, in the construction of boats and in homes as servants. This occurred in the framework of triangular trade, which was a commercial route that was established in the Atlantic Ocean from the fifteenth to the nineteenth century, so it can be considered a long-standing historical phenomenon.

relations between the soviet union and the united states were driven by a complex interplay of ideological, political, and economic factors, which led to shifts between cautious cooperation and often bitter superpower rivalry over the years. the distinct differences in the political systems of the two countries often prevented them from reaching a mutual understanding on key policy issues and even, as in the case of the cuban missile crisis, brought them to the brink of war.

the united states government was initially hostile to the soviet leaders for taking russia out of world war i and was opposed to a state ideologically based on communism. although the united states embarked on a famine relief program in the soviet union in the early 1920s and american businessmen established commercial ties there during the period of the new economic policy (1921–29), the two countries did not establish diplomatic relations until 1933. by that time, the totalitarian nature of joseph stalin's regime presented an insurmountable obstacle to friendly relations with the west. although world war ii brought the two countries into alliance, based on the common aim of defeating nazi germany, the soviet union's aggressive, antidemocratic policy toward eastern europe had created tensions even before the war ended.

b.provides a written record of the transaction