How did the slaves trade develop in the americans

The transatlantic slave trade began in the 15th century, after the Portuguese started exploring the coast of West Africa. At first the number of enslaved Africans taken was small. In about 1650, however, with the development of plantations on the newly colonised Caribbean islands and American mainland, the trade grew.

is there options? or is it random words?

explanation:

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation: