Which technological development led to an increase demand for slaves in the united states during the early-to mid-1800

While the facts used to demonstrate that the cotton gin decreased the work of expelling seeds, it did not diminish the requirement for captives to develop and pick the cotton. The inverse happened. Cotton, becoming turned out to be so gainful for the growth that it significantly expanded their interest for both land and slave work.

Cotton was a mechanical advancement that prompted an expanded interest for slaves in the America during the early-mid 1800s. There it made it simpler to separate seeds from the cotton - making it quicker to pick cotton

answer: the third option is your answer

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: