The Sahara desert is important for a multiple of reasons. One is that although it is a desert, there are many fertile areas of land making it great for farming and supporting life. It also acts as a natural barrier in between north and south Africa, which was able to impact trade with the South, slowing down innovation on both sides.
Turndown, rejection, or declining. Hope this helps.
Answer:
A vertical cut of the globe or the prime meridian divides the globe in to the east and west hemispheres.
European explorers crossed the Atlantic Ocean to reach the Americas.