What did the mixing of north africa occur?

How did inovations in manufacturing lead to improvments in transportation?

The sahel is located on the edge of the sahara desert. a.north b.west c.south d.east

This law states that the "chinese laborers to this country endanger the good order of certain localities" in the united states. which of these would represent a "locality" that would most likely have wanted this law created and passed? a) dallas b) chicago c) atlanta d) san francisco