Answer:
d. our division of time into hours, minutes, and seconds.
Explanation:
The Sumerians were responsible for dividing time the way we do today. First, they determined that the day would begin at sunrise and end only if sunset, where the night would begin that would only end when the sun rose again. After that, observing the skies and their changes throughout the day and night, they developed a complex, but very efficient, division and timing system. They realized that the day could be divided into 24 hours and that each hour could be divided into 60 minutes, so each minute should have 60 seconds.
The 3rd one. The back country
The economic differences between the <em>North</em> and the <em>South</em> led to conflict due to the South's reliance on <u>agriculture</u> led to their dependence on <u>slave labor.</u>
<h3>What is the conflict between the North and the South?</h3>
The economic differences were the major reason that initiated the Civil war between the North and South.
The Nothern regions were more into manufacturing activities while South was dependent on agriculture-related to cotton.
Therefore, the North experinced the industrial revolution but the South was still struggling with <em>slave labor</em> that <u>detorirated</u> their lifestyle.
Learn more about economic conflicts here:
brainly.com/question/9440615
